If you want to know whether a cat is sterilized or not, you can identify it through two points:
1. The owner can observe whether the cat is in estrus in spring and autumn.
2. The owner can wait about half a year after the male cat is neutered to take the male cat for hormone level testing.

What will happen to cats after sterilization:

1. Cats may become more clingy after sterilization. Of course not all cats, but most cats will become more clingy after sterilization. His temper will become a little more docile and clingy.

2. Cats may gain weight after sterilization. Cats can easily gain weight after sterilization, so they must control their weight to avoid being overweight and causing fatty liver.

3. Some cats may hold grudges after being neutered and attack their owners for no reason.