Chico is just 10 yrs old, and since he was a puppy he has been licking his feet after being outside for his walks. I have purchased chews that is supposed to stop the licking. But they are not working. The vet says he has allergies and gave script for Apoquel that is expensive and is for only two weeks. It works but I can't afford to keep him on it all the time. Any other stuff I can give him to stop or slow down the licking?