 It could also be strictly behavior as well. Just like the person who chews on their nails constantly, the dog may have started with a little itch on one paw and then lick and lick and lick and chew. They can actually develop what's called the lick granuloma, which is really difficult sometimes to get rid of. So the first thing we need to find out is why is the dog licking? Is the dog licking because there's some type of allergy reaction? Maybe that's the possibility. If that's the case...