My cats used to be buddies, now one is bullying the other. Help!

Dear Most Esteemed and Knowledgeable Kitties: I have two cats, male (Meow) and female (Cow). They’ve been together since birth and have always been the best of friends. Recently, Meow had a urinary obstruction and had to spend several days at the vet’s while catheterized. Since he got home, Cow has been extremely mean to him. She hisses at him, she sits in doorways so he can’t get through and then slaps him when he tries, and today she even bit him. She’s never been an aggressive cat. I don’t know whether she’s mad at him because he went away, or whether she thinks he smells different now, or what. This has been going on…

Disclaimer

We are not veterinarians. We make no claims to be veterinarians or certified professionals of any kind. The information contained at this website is intended solely for the general information of the reader. It is not intended to diagnose health problems or to take the place of professional medical care. The information contained herein is neither intended to dictate what constitutes reasonable, appropriate or best care for any given health issue, nor is it intended to be used as a substitute for the independent judgment of a veterinarian for any given health issue. The author assumes no liability for the misuse of the information contained at this website.