Hi oceandog –
When you fed raw did you use a novel protein source? Honestly, if he was experiencing these issues on a grain-free raw diet with a novel protein source, I would be inclined to think it’s more likely to be a compulsive behavior or something in the environment. Since raw is not an issue for you, rather than messing around with kibble I’d put him right on a raw diet. I’d personally go with a grind from hare-today.com or mypetcarnivore.com (the grinds contain muscle meat, organ meat, bone and nothing else) – pick one with a protein he’s never eaten before (they’ve got some pretty novel proteins like goat, duck, quail, rabbit, etc.). I’d feed him the grind with a vitamin e supplement, fish oil, kelp/alfalfa blend and a high quality multi-strain probiotic with nothing else for 2-3 months (no treats either!). After 2-3 months, assuming the issues have cleared, gradually start introducing new protein sources and other food items such as vegetables, fruits and eggs. Introduce each item one at a time and closely monitor his reaction. Keep a journal or something noting which foods cause reactions and which don’t. After you figure out which foods trigger his reaction you can start looking into pre-made raw foods (if you wish or you can keep making your own) that don’t contain any of his allergy triggers. If something like this doesn’t work, then I highly doubt his issues are food related.
