I found this article on flea collars so I've been reading, found some more articles and reading a bunch of Amazon reviews, and I think the flea collar could be causing some of his symptoms. I'm going to take it off in the morning and try bathing him and his bedding and everything. They say to use Dawn dish soap to get off the residue. Well, not sure how I'm going to bathe a 140 pound dog in the middle of winter but we'll see lol