My Miley has had issues for years, when it comes to stools. I am currently in the process of having another type of test done to see if she has a different kind of parasite. But, in the mean time, I have been putting Metamucil on their wet food and it has done wonders for her stools. That is not to say that she is cured, as I still have to find out (rule out that is) any parasite etc. But if all is tested and she still has stool issues, it will be Metamucil added to each wet food portion, forever. I don't think it can hurt the other cats to eat it. Basically, it adds fiber to their stools so that the stools are larger but less hard (if that is their issue) and more formed (if that is their issue).... sorta a win/win situation. Of course, I am not a vet, and don't take my advice without checking with your vet. My vet said it was fine to feed to them .... but I am still going forward with the testing for TF.

Good luck.

By the way, I bought capsules of the Metamucil, but will probably buy the powdered without capsules as they are a pain in the neck to open. I don't use much - maybe three capsules for one plate of wet food for all four cats..... Lucy, the black barn cat doesn't really eat wet food, so its just for the three Abys, in the long run.