There are several ways to determine whether a male cat has been neutered and clean. First of all, the owner can wait about half a year after the male cat is neutered to take the male cat for hormone level testing. Secondly, the owner can observe whether the cat is in estrus in spring and autumn. Some male cats will also go into heat after neutering, not because the sterilization operation was unsuccessful, but because the cat's body still has hormones that have not been metabolized.

Precautions after cat sterilization:

1. First of all, you need to put the cat in a quiet, warm place away from sunlight, and pay attention to the cat’s condition. Breathing, pulse, body temperature, and maintain indoor ventilation.

2. Secondly, when the cat’s anesthesia has not completely dissipated, it must be closely monitored to avoid injuries from collisions and the cat jumping with brute force. Especially for female cats, it may cause the intra-abdominal ligature to fall off and cause massive bleeding.

3. Finally, it is recommended to feed the cat sterilization prescription food for 2 days after surgery, and then slowly switch back to ordinary canned cats and cat food.