<<Disclaimer: Verify this information before applying it to your situation.>> My sister's 13 year old cat is ill...he is loosing weight, is anemic, and had foul smelling frequent diarrhea..."nothing showed" on x ray, except an inflammation of the small intestine...I suggested to my sister that she check her cat food for gluten...it DID contain gluten and she has switched to a brand gluten free...the cat has gained weight and his litter box is much easier to live with...when she asked the vet, she was told that cats DO NOT get celiac disease...they want to operate...any suggestions? (my husband has celiac...and if anyone remembers my question about insurance..we wrote, sent copies of bloodwork, tests and articles and (GUESS WHAT) we were denied payment for vitamins....