There are other shepherds with this coloring, do some research. It's hard to say when we don't know the size or age of the puppy. Word to the wise, NEVER ever buy from a pet store. You are not getting a high quality well bred puppy. In fact, you will be paying a lot of money for a poorly bred puppy. Not a "pet quality" puppy, a poorly bred puppy. Many of them suffer from malnutrition as well as bad (really bad) breeding. Early malnutrition can result in bowed legs, and several other conditions. You are not "rescuing" a puppy. You are making room for more poorly bred puppies.