<human>: My dog (Corgi) has this issue where he will chew at the base of his tail until he is raw and bleeding, he will also do this to his front legs from time to time. He only does this when I'm not around and from time to time when I'm asleep I'll wake up to him chewing. My vet has a few ideas but my dog has been chewing for a few month and the vet doesnt have it nailed down yet. It the mean time I have been putting a cone on him while I'm at work so he can't do any damage.

Can you condense the text into three sentences or less?
<bot>: Dog chews his butt, is on flea meds, vet doesn't know what to do, skin looks to be in good condition not hotspots or anything.