They are generally more affectionate. Male cats tend to stop spraying. Spaying and neutering can be done as early as four months of age. Your female pet can be spayed while in heat or pregnant. The outer is left, only the testes are removed.
Appearance depends upon the dog's age at the time of the surgery.
Females and males should be spayed or neutered by 6 months of age. Currently some clinics are performing surgeries on animals as young as 8 weeks of age. As this procedure becomes more common, perhaps it will be available in this area. Older animals can be done as long as they are in good health. All sterilization surgery is performed under general anesthesia by a licensed veterinarian.