I have done my fair share of reading about this subject and belly, leg, and ear rashes, along with paw chewing are common symptoms of
allergies, possibly from food. My dog gets really bad
rashes in her ears and tries to scratch her back, but she is allergic to tons of stuff (grass, beef, fish meal, soy, flax, and weeds to name a few). The most common food allergies in dogs are wheat and corn (Nutro lamb and rice will work for these types of allergies).