Why does a Kitten hisses at mother after sterilization?

It's highly unlikely that a kitten would hiss at its mother after sterilization. Here's why:

* Sterilization doesn't change personality: Sterilization is a surgical procedure that alters reproductive organs. It doesn't affect a kitten's personality, temperament, or instincts.

* Motherly instinct: A mother cat typically continues to nurture and care for her kittens after they're sterilized.

* Kitten behavior: Kittens often hiss out of fear, insecurity, or to communicate with their mother. Hissing can also be a sign of playfulness.

If you are seeing this behavior, it's likely due to a different reason, such as:

* Stress: Changes in the environment, like moving to a new home or the presence of other animals, can cause stress in kittens.

* Illness: A kitten who is ill may exhibit unusual behavior, including hissing.

* Pain: If the kitten is experiencing pain from the sterilization procedure, it may hiss.

* Individual personality: Some kittens are naturally more shy or assertive than others.

It's important to consult a veterinarian if you are concerned about your kitten's behavior. They can assess the situation and rule out any underlying medical issues.