what age do you spay a dog?
<answer> Between 6 and 9 months <context> Why do we perform spay or castration at 6 months of age? Most veterinarians in the United States recommend bitches and dogs be spayed or castrated between 6 and 9 months of age.hy do we perform spay or castration at 6 months of age? Most veterinarians in the United States recommend bitches and dogs be spayed or castrated between 6 and 9 months of age.