Castration of the male dog is one of the most frequently performed surgical procedures in veterinary practice. The reasons for castration include rendering dogs infertile, eliminating objectionable behavior, and eliminating testosterone-dependent disease processes. Although the surgical techniques, ...
Castration of the male dog is one of the most frequently performed surgical procedures in veterinary practice. The reasons for castration include rendering dogs infertile, eliminating objectionable behavior, and eliminating testosterone-dependent disease processes. Although the surgical techniques, indication, and complications of castration have been extensively described, the information on behavioral changes following castration in dogs has not been well studied. This study was carried out to investigate the effects of castration on behavioral changes in male dogs. Twenty-four clinically healthy male dogs weighing 2 to 20 kg were allocated to two groups; Group Ⅰ consisted of 12 dogs castrated before 7 months old. Group Ⅱ consisted of 12 dogs castrated after 7 months old. Telephone interviews were conducted with owners to determine behavioral problems observed in the dogs following castration. Behaviors were recorded in the questionnaire 1 and 2. Questionnaire 1 was recorded before operation, and questionnaire 2 was recorded in 1, 3, 6, 9 and 12 months after operation. Questionnaire 1 composed of 65 behavioral characteristics, and questionnaire 2 composed of 71 behavioral characteristics. The behavioral characteristics included excitability, barking, playfulness, mounting, urine marking, aggression towards other dogs, affection towards people, and outgoing nature. Sexual behaviors were the most frequent referral cases. Hypersexual behavior toward people was decreased after castration in 82% of the affected dogs. The sexual interest toward other male and female dogs declined in 69% of the dogs. Urinary behaviors were reduced after castration in approximately 65% of the dogs. The castration affected the sexual behaviors, but not urinary behaviors, and the castration influenced on increment of food intake and weight gain in 16 male dogs. The side effects of castration showed increment of body weight and appetite, changes in the coat, and decrement of activity in 37.5% of the dogs. Aggression and excessive barking were observed after castration. In a 12-month study, the effects of castration on weight gain, food intake, and behavioral development were observed in 19 out of 24 male dogs. The improvements of behavioral problems were reviewed by vet at 12 months after surgery(Group Ⅰ〔86.3%〕〉Group Ⅱ〔66.1%〕). The satisfied owners(100%) of the dog at 12 months after castration were in Group Ⅰ(58.3%) and Group Ⅱ(16.7%). In conclusion, castration before 7 months olds was considered to be more effective on owner's satisfaction than the castration after 7 months olds.
Castration of the male dog is one of the most frequently performed surgical procedures in veterinary practice. The reasons for castration include rendering dogs infertile, eliminating objectionable behavior, and eliminating testosterone-dependent disease processes. Although the surgical techniques, indication, and complications of castration have been extensively described, the information on behavioral changes following castration in dogs has not been well studied. This study was carried out to investigate the effects of castration on behavioral changes in male dogs. Twenty-four clinically healthy male dogs weighing 2 to 20 kg were allocated to two groups; Group Ⅰ consisted of 12 dogs castrated before 7 months old. Group Ⅱ consisted of 12 dogs castrated after 7 months old. Telephone interviews were conducted with owners to determine behavioral problems observed in the dogs following castration. Behaviors were recorded in the questionnaire 1 and 2. Questionnaire 1 was recorded before operation, and questionnaire 2 was recorded in 1, 3, 6, 9 and 12 months after operation. Questionnaire 1 composed of 65 behavioral characteristics, and questionnaire 2 composed of 71 behavioral characteristics. The behavioral characteristics included excitability, barking, playfulness, mounting, urine marking, aggression towards other dogs, affection towards people, and outgoing nature. Sexual behaviors were the most frequent referral cases. Hypersexual behavior toward people was decreased after castration in 82% of the affected dogs. The sexual interest toward other male and female dogs declined in 69% of the dogs. Urinary behaviors were reduced after castration in approximately 65% of the dogs. The castration affected the sexual behaviors, but not urinary behaviors, and the castration influenced on increment of food intake and weight gain in 16 male dogs. The side effects of castration showed increment of body weight and appetite, changes in the coat, and decrement of activity in 37.5% of the dogs. Aggression and excessive barking were observed after castration. In a 12-month study, the effects of castration on weight gain, food intake, and behavioral development were observed in 19 out of 24 male dogs. The improvements of behavioral problems were reviewed by vet at 12 months after surgery(Group Ⅰ〔86.3%〕〉Group Ⅱ〔66.1%〕). The satisfied owners(100%) of the dog at 12 months after castration were in Group Ⅰ(58.3%) and Group Ⅱ(16.7%). In conclusion, castration before 7 months olds was considered to be more effective on owner's satisfaction than the castration after 7 months olds.
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