I have a larger breed dog that has developed callus' on his elbows. He has taken to scratching them with his back legs and then licking them when they bleed. Google tells me this is a common problem with larger breed dogs. He has a bed, but prefers the floor because it is cooler and google tells me that this is one of the causes of the callus developing. But has anyone had any luck treating them at home or somehow helping the dog with the uncomfortability and itching then licking?