Why is my momma cat hissing at her 6mo. old kittens ? ?

Question

This just started today after I brought them home from being spayed & neutered . Do they have a scent from the vet. staff and will she stop after a while ?

Answer 1

Whenever we've brought home a cat that's been fixed or been at the vets for a day, our other cats have done the same thing. I'd keep an eye on them to make sure she doesn't hurt them but I'm willing to bet it's all the smells on them.  

Answer 2

I'm quite certain that it's the unfamiliar smells of the vet. As time goes by and the kittens start getting back their own personal scents, she'll figure out who they are and the hostility should go away.