This morning when i let the girls out of the coop i noticed that my LB had dried blood on the side of her head. After a little closer inspection i noticed it is on both sides, i *think* where her ears are. What could have caused this? All of the girls are really sweet, she is actually the only aggressive one (and by aggressive i mean she instigates chest bumping) so i don't think any of them pecked her. Plus the fact that it is in the same spot on both sides makes me think it's ear related. They are 11 weeks old, and are locked in a very secure coop at night. Help!