Can someone please help? Lewie has started scratching himself with his hind feet to right behind his shoulders… He seems to itch so much that he frequently has to scratch in mid-walk... It seems like it's really bothering him. There is nothing on his skin and no fleas (knock on wood)... We haven't changed food or treats recently, so I'm not really suspect of that. I don't really want to give him medication unless it's the last resort.