Leaking anus in cats. And sometimes she'll get diarrhea if it's useful information I don't know the cause because it'll come and go in a day. I have a kitten who is switching over to dry food and has become constipated what should I do? Her behind is red and swollen slightly. The other day, he showed symptoms of trying to defecate but there was nothing coming out. I took her to the vet to get prednisone, they ended up giving her triple the dose and children's prednisone. Chronic, or long-lasting, illness can cause your cat to stop or drastically reduce his grooming frequency. Has Symptoms Red butthole, swollen butthole. Could you please help me figure out what it could be and what to do.