My 5 year old pug is licking a hole in my screen door and I've tried everything! I've cleaned the door and put bitter spray on it and still he licks it any time the wooden door is open! It's like a compulsive thing he has kongs and toys but he prefers to spend his days licking the door. Its the only door in the house that he licks and he's teaching my Akita puppy to lick the door! What can i do to end this?