Neutering your dog is part of responsible pet ownership. If your dog is a mixed breed, does not have any conformation or performance titles or has not been tested and cleared of genetic flaws, he should not be bred. Neutering reduces the stress your dog experiences around intact (unspayed) females in heat and can reduce his risk for certain cancers. Under most circumstances, neutering has no negative effects and will not affect his growth.
When dogs are neutered before puberty, it's called pediatric neutering. This procedure has become increasingly popular due to pet overpopulation, because surgery is faster to perform and because younger animals recover more quickly from surgery. At one time, veterinarians were concerned that dogs neutered before puberty would have stunted growth. In reality, dogs neutered before puberty experienced delayed closing of the growth plates due to hormonal loss. The failure of these growth plates to close results in longer legs and a slight increase in height.
It is traditional to neuter dogs between the ages of 6 and 9 months. No height changes have been seen to occur when dogs are neutered at this time. Research done using more than 750 golden retrievers suggests that dogs of that breed that are neutered before a year in age may experience the delayed growth plate closing and other orthopedic issues associated with pediatric neutering.
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