초록

A method of enhancing milk component production in a ruminant, the method including providing a feed that includes a sugar alcohol and supplying the sugar alcohol to the abomasum of the ruminant.

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1. A method of enhancing milk component production in a ruminant, the method comprising:providing a feed that comprises sorbitol, xylitol or glycerol in an amount that enhances milk component production; protecting the sorbitol, xylitol or glycerol from significant alteration in the rumen of the rum

1. A method of enhancing milk component production in a ruminant, the method comprising:providing a feed that comprises sorbitol, xylitol or glycerol in an amount that enhances milk component production; protecting the sorbitol, xylitol or glycerol from significant alteration in the rumen of the ruminant; supplying the sorbitol, xylitol or glycerol to the abomasum of the ruminant; and orally feeding the feed to the ruminant. 2. The method of claim 1 wherein enhancing milk component production comprises enhancing the weight percent of true protein, the weight percent of fat, the weight percent of lactose, the weight percent of total solids, or any combination of these in milk produced by the ruminant.3. The method of claim 1 wherein protecting the sorbitol from significant alteration in the rumen of the ruminant allows at least about 50 weight percent of the sorbitol that is orally ingested by the ruminant to arrive unaltered, as sorbitol, in the abomasum of the ruminant after passing through the rumen of the ruminant.4. A method of feeding a ruminant, the method comprising:providing a feed the comprises sorbitol, xylitol or glycerol, or any combination thereof; protecting the sorbitol, glycerol, xylitol or any combination thereof from significant alteration in the rumen of the ruminant; supplying the sorbitol, glycerol, xylitol or any combination thereof to the abomasum of the ruminant, the sorbitol, glycerol, xylitol or any combination thereof in an amount effective to enhance milk component production by the ruminant; and orally feeding the feed to the ruminant. 5. The method of claim 4 wherein enhancing milk component production comprises enhancing the weight percent of true protein, the weight percent of fat, the weight percent of lactose, the weight percent of total solids, or any combination of these in milk produced by the ruminant.6. The method of claim 4 wherein protecting the sorbitol from significant alteration in the rumen of the ruminant allows at least about 50 weight percent of the sorbitol that is orally ingested by the ruminant to arrive unaltered, as sorbitol, in the abomasum of the ruminant after passing through the rumen of the ruminant.7. A method of enhancing milk component production in a ruminant, the method comprising:providing a feed that comprises sorbitol, glycerol, xylitol or any combination thereof; supplying the sorbitol, glycerol, xylitol or any combination thereof to the abomasum of the ruminant in an amount that supplies a nutritional effect to the ruminant, supplying the sorbitol, glycerol, xylitol or any combination thereof to the abomasum of the ruminant comprising: protecting the sorbitol, glycerol, xylitol or any combination thereof from significant alteration in the rumen of the ruminant; and orally feeding the feed to the ruminant. 8. The method of claim 7 wherein protecting sorbitol from significant alteration in the rumen of the ruminant allows at least about 50 weight percent of the sorbitol that is orally ingested by the ruminant to arrive unaltered, as sorbitol, in the abomasum of the ruminant after passing through the rumen of the ruminant.9. The method of claim 7, the method further comprising protecting the sorbitol, glycerol, xylitol or any combination thereof from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sorbitol, glycerol, xylitol or any combination thereof, that is orally ingested by the ruminant to arrive unaltered, as sorbitol, glycerol, xylitol or any combination thereof, in the abomasum of the ruminant after passing through the rumen of the ruminant.10. The method of claim 7, the method further comprising protecting the sorbitol, glycerol, xylitol or any combination thereof from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sorbitol, glycerol, xylitol or any combination thereof that is orally ingested by the ruminant to arrive unaltered, as sorbitol, glycerol, xylitol or any combination thereof, in the abomasum of the ruminant after passing through the rumen of the ruminant.11. The method of claim 7 wherein enhancing milk component production includes enhancing the weight percent of true protein, the weight percent of fat, the weight percent of lactose, the weight percent of total solids, or any combination of these in milk produced by the ruminant.12. The method of claim 7 wherein enhancing milk component production comprises enhancing the weight percent of true protein in milk produced by the ruminant.13. The method of claim 7 wherein enhancing milk component production comprises enhancing the weight percent of fat in milk produced by the ruminant.14. The method of claim 7 wherein enhancing milk component production comprises enhancing the weight percent of lactose in milk produced by the ruminant.15. The method of claim 7 wherein enhancing milk component production comprises enhancing the weight percent of total solids in milk produced by the ruminant.16. A method of enhancing milk component production in a ruminant, the method comprising:providing a feed that comprises sorbitol; supplying the sorbitol to the abomasum of the ruminant in an amount effective to enhance milk component production, supplying the sorbitol to the abomasum of the ruminant comprising: protecting the sorbitol from significant alteration in the rumen of the ruminant, wherein protecting the sorbitol from significant alteration in the rumen of the ruminant allows at least about 50 weight percent of the sorbitol that is orally ingested by the ruminant to arrive unaltered, as sorbitol, in the abomasum of the ruminant after passing through the rumen of the ruminant; and orally feeding the feed to the ruminant. 17. The method of claim 16, the method further comprising protecting the sorbitol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sorbitol that is orally ingested by the ruminant to arrive unaltered, as sorbitol, in the abomasum of the ruminant after passing through the rumen of the ruminant.18. The method of claim 16, the method further comprising protecting the sorbitol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sorbitol that is orally ingested by the ruminant to arrive unaltered, as sorbitol, in the abomasum of the ruminant after passing through the rumen of the ruminant.19. The method of claim 16 wherein enhancing milk component production comprises enhancing the weight percent of true protein, the weight percent of fat, the weight percent of lactose, the weight percent of total solids, or any combination of these in milk produced by the ruminant.20. The method of claim 16 wherein enhancing milk component production comprises enhancing the weight percent of true protein in milk produced by the ruminant.21. The method of claim 16 wherein enhancing milk component production comprises enhancing the weight percent of fat in milk produced by the ruminant.22. The method of claim 16 wherein enhancing milk component production comprises enhancing the weight percent of lactose in milk produced by the ruminant.23. The method of claim 16 wherein enhancing milk component production comprises enhancing the weight percent of total solids in milk produced by the ruminant.24. A method of feeding a ruminant, the method comprising:providing a feed that comprises a sugar alcohol, the sugar alcohol being ruminally-protected and the sugar alcohol including sorbitol, glycerol, xylitol, or any of these in any combination; and supplying the sugar alcohol to the abomasum of the ruminant in an amount effective to enhance the weight percent of true protein in milk produced by the ruminant. 25. The method of claim 24 wherein supplying the sorbitol to the abomasum of the ruminant comprises orally feeding the sorbitol to the ruminant, the method further comprising protecting sorbitol from alteration in the rumen of the ruminant to a degree that allows at least about 50 weight percent of the sorbitol that is orally ingested by the ruminant to arrive unaltered, as sorbitol in the abomasum of the ruminant after passing through the rumen of the ruminant.26. The method of claim 24 wherein supplying the sorbitol, glycerol, xylitol or any combination thereof to the abomasum of the ruminant comprises orally feeding the sorbitol, glycerol, xylitol or any combination thereof to the ruminant, the method further comprising protecting the sorbitol, glycerol, xylitol or any combination thereof from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sorbitol, glycerol, xylitol or any combination thereof that is orally ingested by the ruminant to arrive unaltered, as sorbitol, glycerol, xylitol or any combination thereof in the abomasum of the ruminant after passing through the rumen of the ruminant.27. The method of claim 24 wherein supplying the sorbitol, glycerol, xylitol or any combination thereof to the abomasum of the ruminant comprises orally feeding the sorbitol, glycerol, xylitol or any combination thereof to the ruminant, the method further comprising protecting the sorbitol, glycerol, xylitol or any combination thereof from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sorbitol, glycerol, xylitol or any combination thereof that is orally ingested by the ruminant to arrive unaltered, as sorbitol, glycerol, xylitol or any combination thereof, in the abomasum of the ruminant after passing through the rumen of the ruminant.28. A method of feeding a ruminant, the method comprising:providing a feed that comprises a sugar alcohol, the sugar alcohol being ruminally-protected and the sugar alcohol comprising sorbitol; and supplying the sugar alcohol to the abomasum of the ruminant in an amount effective to enhance the weight percent of true protein in milk produced by the ruminant. 29. The method of claim 28 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 50 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.30. The method of claim 28 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.31. The method of claim 28 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.32. A method of feeding a ruminant, the method comprising:providing a feed that comprises a sugar alcohol, the sugar alcohol being ruminally-protected and the sugar alcohol comprising glycerol; and supplying the sugar alcohol to the abomasum of the ruminant in an amount effective to enhance the weight percent of true protein in milk produced by the ruminant. 33. The method of claim 32 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 50 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.34. The method of claim 32 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.35. The method of claim 32 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.36. A method of feeding a ruminant, the method comprising:providing a feed that comprises a sugar alcohol, the sugar alcohol being ruminally-protected and the sugar alcohol comprising xylitol; and supplying the sugar alcohol to the abomasum of the ruminant, sugar alcohol effective to enhance the weight percent of lactose in milk produced by the ruminant. 37. The method of claim 36 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 50 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.38. The method of claim 36 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.39. The method of claim 36 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.40. A method of feeding a ruminant, the method comprising:providing a feed that comprises a sugar alcohol, the sugar alcohol being ruminally-protected and the sugar alcohol comprising sorbitol; and supplying the sugar alcohol to the abomasum of the ruminant, the sugar alcohol effective to enhance the weight percent of lactose in milk produced by the ruminant. 41. The method of claim 40 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 50 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.42. The method of claim 40 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.43. The method of claim 40 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.44. A method of feeding a ruminant, the method comprising:providing a feed that comprises a sugar alcohol, the sugar alcohol being ruminally-protected and the sugar alcohol comprising glycerol; and supplying the sugar alcohol to the abomasum of the ruminant, the sugar alcohol effective to enhance the weight percent of lactose in milk produced by the ruminant. 45. The method of claim 44 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 50 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.46. The method of claim 44 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.47. The method of claim 44 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.48. A method of feeding a ruminant, the method comprising:providing a feed that comprises a sugar alcohol, the sugar alcohol being ruminally-protected and the sugar alcohol comprising xylitol being ruminally-protected; and supplying the sugar alcohol to the abomasum of the ruminant, the sugar alcohol effective to enhance the weight percent of true protein in milk produced by the ruminant. 49. The method of claim 48 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 50 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.50. The method of claim 48 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.51. The method of claim 48 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.52. A method of feeding a ruminant, the method comprising:providing a feed that comprises a sugar alcohol, the sugar alcohol being ruminally-protected and the sugar alcohol comprising sorbitol; and supplying the sugar alcohol to the abomasum of the ruminant, the sugar alcohol effective to enhance the weight percent of fat in milk produced by the ruminant. 53. The method of claim 52 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 50 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.54. The method of claim 52 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.55. The method of claim 52 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.56. A method of feeding a ruminant, the method comprising:providing a feed that comprises a sugar alcohol, the sugar alcohol being ruminally-protected and the sugar alcohol comprising glycerol; and supplying the sugar alcohol to the abomasum of the ruminant, the sugar alcohol effective to enhance the weight percent of fat in milk produced by the ruminant. 57. The method of claim 56 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 50 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.58. The method of claim 56 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.59. The method of claim 56 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.60. A method of feeding a ruminant, the method comprising:providing a feed that comprises a sugar alcohol, the sugar alcohol being ruminally-protected and the sugar alcohol comprising xylitol; and supplying the sugar alcohol to the abomasum of the ruminant, the sugar alcohol effective to enhance the weight percent of total solids protein in milk produced by the ruminant. 61. The method of claim 4, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.62. The method of claim 4, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.63. The method of claim 60 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 50 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.64. The method of claim 60 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.65. The method of claim 60 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.66. A method of feeding a ruminant, the method comprising:providing a feed that comprises a sugar alcohol, the sugar alcohol being ruminally-protected and the sugar alcohol comprising sorbitol; and supplying the sugar alcohol to the abomasum of the ruminant, the sugar alcohol effective to enhance the weight percent of total solids in milk produced by the ruminant. 67. The method of claim 66 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 50 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.68. The method of claim 66 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.69. The method of claim 66 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.70. A method of feeding a ruminant, the method comprising:providing a feed th at comprises a sugar alcohol, the sugar alcohol be ing ruminally-protected and the sugar alcohol comprising glycerol; and supplying the sugar alcohol to the abomasum of the ruminant, the sugar alcohol effective to enhance the weight percent of total solids in milk produced by the ruminant. 71. The method of claim 70 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 50 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.72. The method of claim 70 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.73. The method of claim 70 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.74. A method of feeding a ruminant, the method comprising:providing a feed that comprises a sugar alcohol, the sugar alcohol being ruminally-protected and the sugar alcohol comprising xylitol; and supplying the sugar alcohol to the abomasum of the ruminant, the sugar alcohol effective to enhance the weight percent of true protein, lactose, fat, total solids, or any combination of any of these in milk produced by the ruminant. 75. The method of claim 74 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 50 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.76. The method of claim 74 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.77. The method of claim 74 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.78. A method of feeding a ruminant, the method comprising:providing a feed that comprises a sugar alcohol, the sugar alcohol being ruminally-protected and the sugar alcohol comprising sorbitol; and supplying the sugar alcohol to the abomasum of the ruminant, the sugar alcohol effective to enhance the weight percent of true protein, lactose fat, total solids, or any combination of any of these in milk produced by the ruminant. 79. The method of claim 78 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 50 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.80. The method of claim 78 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.81. The method of claim 78 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.82. The method of claim 78 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 50 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.83. The method of claim 78 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.84. The method of claim 78 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.85. A method of feeding a ruminant, the method comprising:providing a feed that comprises a sugar alcohol, the sugar alcohol being ruminally-protected and the sugar alcohol comprising glycerol; and supplying the sugar alcohol to the abomasum of the ruminant, the sugar alcohol effective to enhance the weight percent of true protein, lactose fat, total solids, or any combination of any of these in milk produced by the ruminant. 86. The method of claim 85 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 50 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.87. The method of claim 85 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.88. The method of claim 81 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.89. The method of claim 81 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 50 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.90. The method of claim 85 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.91. The method of claim 85 wherein supplying the sugar alcohol to the abomasum of the ruminant comprises orally feeding the sugar alcohol to the ruminant, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.92. The method of claim 1, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 75 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.93. The method of claim 1, the method further comprising protecting the sugar alcohol from alteration in the rumen of the ruminant to a degree that allows at least about 90 weight percent of the sugar alcohol that is orally ingested by the ruminant to arrive unaltered, as sugar alcohol, in the abomasum of the ruminant after passing through the rumen of the ruminant.94. The method of claim 1 wherein enhancing milk component production comprises enhancing the weight percent of true protein in milk produced by the ruminant.95. The method of claim 1 wherein enhancing milk component production comprises enhancing the weight percent of fat in milk produced by the ruminant.96. The method of claim 1 wherein enhancing milk component production comprises enhancing the weight percent of lactose in milk produced by the ruminant.97. The method of claim 1 wherein enhancing milk component production comprises enhancing the weight percent of total solids in milk produced by the ruminant.