Many cats can suffer from inflammatory bowel disease and food allergies, which cause gastrointestinal issues. Try switching your
cat as advised above. Good brands of canned
cat food are Evo/Innova, Orijin, Wellness, Nature's Variety and many others (since new brands are coming out every day). Read the labels! You will want human grade meat, fish, or fowl, zero carbs, etc. If your cat continues to have GI problems than a hypoallergenic, novel protein diet should be tried.