What kind of food were you feeding your dog?
Many skin allergies are the result of food allergies. My friend
had a similar issue with her Golden, when she switched to a holistic
dog food(Innova) all these problems were relieved. I have had my GSD
on Innova from Day 1, but since P&G bought them out I have switched
to
Nature's Variety fearing that they will ruin the product line like
they did with Eukanuba. I have heard Blue Buffalo is a great food as
well. I recently went to the beach with my GSD and he loved it and
playe din the salt water. When we came home he was itching like crazy
and thought he was having some kind of reaction to the sand/sun/surf.
It's gone now, but I think it was due to him blowing his winter coat.