[Dennis H]

We have an 8 month old airedale who was being feed a puppy food which we thought would be good. Suddenly she started to loose air on the legs and belly. No sores or rash just black smooth skin. Having been breeding and showing dogs for 50 years we did ask the vet who suggested a change in food first, which is what we thought.
Changed and within a month new coat is growing. She eats well and is a free feeder.
What are the skin symptoms, scratching, open sores, rash, or just hair loss?