I took in my kitten to get spayed. The Mother of this kitten stayed at our house and when we brought home her kitten after the operation, the mother kept attacking and hissing at her. The Vet said that they put some special spray on the wound and that the smell may make them irritable towards each other but this is ridiculous. It is a warzone in our apartment. Is this weird? How do I make it stop because it is getting really annoying, any help would be much appreciated.