Have you considered that it could be the lentils or peas in grain-free novel protein kibbles that are causing the issue? Try checking the foods for common allergens besides the meat meal, like potatoes, alfalfa, lentils, peas, or meals that aren’t listed on the front of the bag.
Also, if you haven’t tried fish or turkey, or if those dry foods have other ingredients in them that could be the trigger, consider trying the Freshpet lines of Vital grain free. They have a turkey and a salmon meal that have fish, but no lentils, peas, or other non-meat allergens, just some veggies. They’re here:
http://freshpet.com/products/vitalgrainfreeturkeyrecipe/
http://freshpet.com/products/vitalsalmonrecipe/
All dry kibbles have SOME binder, and even the “grain free” kind need a starch like potatoes, peas, lentils, chickpeas, etc. Some dogs can’t tolerate those, and they are a protein source, so they can be the problem. A canned, fresh, or freeze dried food with no binders may help you isolate whether it’s the meat causing issues or another protein source. That may open you up to non-kangaroo options in the future.
