Please let us know what the white coats say about the ears and feet. I hope they get the problem nailed down and provide quick relief for the itching.

I have one of two guesses, although I'm not a vet but I did stay at a Holiday Inn Express last night. ROFL

Seriously though, yes ear problems could be related to the food as well as the feet. Skin and ear problems are frequently a symptom of allergies in dogs/cats.

My second guess would be a staph infection. We have occasionally seen where it starts in the ears and when the dog paws at it's ears the infection transfers to the feet, although actually it affects the whole body even where you don't see it. Usually though a staph infection is accompanied by a foul smelling odor which I didn't notice you posting anything about.

Keep us posted and I hope things go well at the vets.