I got my cat Simon in November 2008 (he was 6 months old) and he's had diarrhea ever since. They diagnosed him with ghiardia around Christmas time and both him and my other cat (who is fine and never had loose stools to date) were treated.
A month later, the diarrhea started again! I took him in for testing around March 09 and basic fecal tests were done...and nothing was found. My vet said to try adding a bit of plain Metamucel to their food every day and its seemed to help but not fix the problem.
There's nothing else wrong with him. He has a healthy appetite (in fact he's a big eater) and water consumption is good. His coat has gotten much shinier and softer since he was sick and everyone agrees he's a beautiful cat. He's gaining weight, active and very happy/energetic. However he still has soft stool. No blood or black tarry feces - just a little loose and a little stinky. What could this be? Should I try switching food (I've yet to do that)?
I'm very sensitive to their behavior and have not noticed any other abnormalities about him. The only thing I can say is he's an extremely nervous cat. He was abandoned at a young age and I think developed a very "scaredy cat" mentality from that. Can cats get diarrhea from nerves just like people?
A dietary change may be in order. Cat's can have food allergies and inflammatory bowel disease, and this can cause loose stool.
If he is not on an all meat canned diet yet than please try switching. Good brands are Evo/Innova, Merrick's, Natures Variety, Wellness and others. The optimal formula will have human grade meat, fish or fowl, NO carbohydrates, especially NO grains, and will contain vitamins and minerals, and can be raw, if pasteurized. If your cat has a food allergy he should be on a novel protein, such as lamb, which is novel to cat food. He should also be on a probiotic. Prescription hypoallergenic diets are also available from your veterinarian, but only use the canned variety.
The addition of a Chinese herbal formula: Shen Ling Bai Zhu (available online) will help to form the stool.
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