I have no clue my dog's personality has changed some ever since he started biting his tail. Before then he was all jittery, and playful, now he just sits in front of the trashcan all day, until I take him outside. I wonder what's wrong and he continues to bite himself, making him bleed. I have a :skull::skull::skull::skull:zu.

Edit: what's with the skulls messing up my post?