Is anyone else's Golden obsessed with his/her hair? Logan will pull out large chunks of his undercoat from his tail and then eat it. If I'm brushing him, he will try to get to the pile of hair that he has shed and eat it. Is this normal, or should I be concerned? He doesn't have any hot spots/itching/allergy issues that we know of, and the hair he pulls out is hair that needs to be shed anyway (I think).