It is best for dogs to be neutered at eight months of age. Neutering too early will affect the dog’s bone development. Neutering older dogs will increase the risks of surgery and anesthesia. Sterilization minimizes the risk of pyometra. Sterilization also eradicates testicular and ovarian cancer and minimizes the risk of uterine cancer. Therefore, if there is no plan to get the dog pregnant for breeding, it is recommended that the owner have the dog neutered as soon as possible.