I am going so crazy right now. Carter has had a skin rash that I didn't find until he licked himself bald on the undersides of his legs. He was in the vet's office Saturday, they gave him a Depo shot and a prescription for Clavamox. But he's still licking his legs and the rashes are looking a lot more raw. I'm really worried about him - I don't know how to get him to leave the rashes alone. Should I get him an E-collar or something?