My Westie likes to lick his feet. He was doing this a year ago and put him on Gen One spray daily and he stopped. I dry his feet from the morning dew, spray, powder, and even give Benadryl. Any suggestions? He is doing it again and his feet are turning a rusty color. My vet says to put him on antidepressants as he sees it as more of an OCD thing with Westies than an actual allergy condition. ANY RECOMMENDATIONS?