We recently adopted a 5 yr old GSD from Austin, TX which is about an hour and a half from San Antonio where we live. We've had him for about 11 days. He seems to be scratching a lot, particularly on his sides about 3/4 of the way back from his neck. When we visited him at his foster home, I saw him scratch a couple of times and they said he occasionally would get after a spot here and there, but it didn't seem like an issue. Since bringing him home it seems like he's been scratching an awful lot at his sides. He's our first dog, so I'm not sure how much scratching is too much. I wondered about his skin reacting to a climate change, but he only moved an hour and a half south. We bought some hot spot treatment, but it doesn't seem to be helping. Should we take him to the vet to have it checked out?