He is an IBD cat.. so he is on
raw foods, which prevent him from having loose stools, chronic diarrhea and
blood in
it. Opus' kitties are also special needs kitties, and they need special diets. So yours might just be one of those who need extra nutrients, or perhaps some ingredients in the diet are making him sick. Purina has a lot of by-products and grains, corn, rice, and stuff kitties don't really benefit from, as obligate carnivores that they are.