Neutering a female cat will change her original life, disrupt all the previous rules, and at the same time eliminate the female cat’s right to be a mother, which will lead to problems in the ecological balance of the cat world. Furthermore, the cat will have a period of time after sterilization. There will be loss of appetite and lack of energy, and there is a possibility of depression during this period. In addition, cat sterilization requires surgery, and there is a certain risk of illness during the operation. Failure to do so may lead to the death of the cat.