I have not seen this mentioned yet, but a small amount of canned PURE pumpkin (no extra spices or other additives or ingredients) added to the food or even fed separately if the cat likes it, can help balance out the stool. Some cats really like the pumpkin, too, and they eat it happily.
I say "balance out the stool", because it can help with both diarrhea (D) and constipation (C). You may want to talk with your vet or a feline-focused vet about this... I always suggest consulting with a vet when treating a medical condition. But or vet when I was a tech often used pumpkin to help with stool issues, either as a sole treatment in some cases, or in addition to other medication to treat a problem (D or C).
If you decide to go with the pumpkin, look for canned pumpkin that says 100% pure, and has nothing else added. In the US, Libby's brand is one option.
I say "balance out the stool", because it can help with both diarrhea (D) and constipation (C). You may want to talk with your vet or a feline-focused vet about this... I always suggest consulting with a vet when treating a medical condition. But or vet when I was a tech often used pumpkin to help with stool issues, either as a sole treatment in some cases, or in addition to other medication to treat a problem (D or C).
If you decide to go with the pumpkin, look for canned pumpkin that says 100% pure, and has nothing else added. In the US, Libby's brand is one option.