The benefits of sterilizing cats and dogs are: preventing diseases of the reproductive organs, eliminating the worry of estrus, calming the pet's mood, and extending the life of the pet; the disadvantages of sterilizing cats and dogs are: there are certain risks during sterilization, and the pet will suffer from post-operative sterilization. Changes in the body will also affect their thoughts, leading to symptoms of depression and inactivity. Pet sterilization has both good and bad consequences. Breeders who want to sterilize their own cats and dogs must learn more about it before making a decision.