My 7 year old GSD has had anxiety issues since we got him 3 years ago. He licks a spot on his paw obsessively until it is raw. We give him antibiotic drops and he uses an anti-anxiety medication. We recently got a new puppy with the hope that the puppy would end up being good company for him, when the pup is older more so. Well, this isn't happening. My 7 y/o is licking worse than ever and I don't know how to help him. Any suggestions?