I would agree with Patty. It may be chicken issue. I recently discovered my dog has a fish issue. I switched to a fish-free food, but it still contained fish oil, which in theory should’ve been OK (fat and oils are clarified and should have the offending protein removed); but he still reacted. Now I only feed foods that are completely fish free. For your dog, I would try a chicken free food. If that food contains chicken fat, see how he does. If he reacts, move to a chicken free food, one without chicken or chicken fat.
The best advice I can give you is what helped me the most. Start now and keep detailed notes about each food you use. I started a spreadsheet and keep detailed notes about each food I’ve used. Detail the ingredients (keep the label from the bag ~ ingredients change and what you find online in six months may be different that what your dog are and reacted to. I note the date I start the food, when I observe reactions, nutrient analysis, etc. My only regret is not having started my spreadsheet sooner. Some foods that my pup once did well on, aren’t working any longer so even when I’ve found several that do work, I’ll continue to keep notes and look for other foods. I once had an idea that I loved certain foods / brand, but I’ve had to think outside of my original box, but never outside of my comfort zone; ie: I pay I never have to try a Diamond food. I know my sensitive dog will always be a sensitive dog and his current reaction may evoke into other reactions.
Good luck!
