While it is responsible for you to get your dog neutered or spayed, there is a mountain of evidence that doing so before your dog reaches sexual maturity increases the risk of cancer, tumors and other health problems. Yet, many vets will advise you to neuter or spay as soon as possible. This excellent article from Dogs First lays out the cons of early neutering with links to all scientific studies referenced. I highly recommend you read this article and discuss it with your veterinarian before you decide when to neuter or spay your dog.
