Liz Buchanan BVSc MRCVS
Keymaster
Hello! Chronic diarrhoea is not uncommon in certain pedigree cats and can have a multitude of causes, including parasites (worms, giardia), bacteria, allergy, pancreatitis, liver disease, cancer, and various inflammatory diseases of the bowel often linked to allergies. You list a lot of remedies and diets that you have tried and in some cases, trying remedies can prove effective; you might hit on exactly the right thing, or else the problem might pass on its own accord. However, trying one thing after another can have its drawbacks: 1) each 'thing' needs to be tried consistently for a substantial amount of time before it can be said not to be working. 2) there are a lot of different possible bugs, parasites, immune conditions and organ conditions that may be causing the problem. The chances of you hitting on the 'right' treatment by trial and error are quite slim - that is, after the basics (ie an appropriate diet and complete, consistent parasite regime) are in place. Chicken, for example, may be an allergen for some cats (although it's not a common one in my experience), but so might beef, mouse, lamb, pork, grain, certain soya proteins and so on and so on. It would take a long time to trial test for every allergen in this manner and it doesn't sound as though time is on your side.
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