What is wrong with my cat?
I have four outside cats and today I washed them with flea shampoo. Two of the cats are brothers but all four of them get along. But suddenly, one of the brothers is hissing, growling, and swipping at the other three while those three get along just fine again. I understand washing them may not have been smart because their scents were washed off, but they used to be so close and used to be so nice to each other. Why is this one cat being so mean all of a sudden and how can I stop it and fix their relationships??