Just a couple of months ago, I took in a little guy who had a history of prolapses. He had several procedures in the past to correct it. When I got him, it was prolapsed and very angry red. Because some in his group were having loose stools, I decided to gradually switch them to another food. They are all seniors so I decided on Royal Canin PV (pea and venison) Adult Feline. This is a hypoallergenic formula. I was very surprised to see Boba's rectum go back to completely normal, something I wasn't expecting at all. It has remained normal. Coincidence? I don't think so. Turned out to be caused by a reaction to food, probably either grains or poultry. Certainly something to explore. Katharine Florida [Posted in FML 7173]