Well I am by no means an expert with this dog food thing, but from comparing the ingredients of the two foods I was using and Dooleys reactions to the foods, I was able to narrow down some things I think he may be having a reaction to. The main one being chicken. from what Ive been reading, lots of EBD are allergic to chicken.
Also if you are feeding a good quality food, I think you are ok going straight to an all stages rather than a puppy food.