Hi everybody. Lately 2 of my 5 chickens have been experiencing some feather loss. What is this from? Lately we had a raccoon get in our coop but miraculously not kill any of the birds. But it had taken the tail feathers off of the two that are starting to lose feathers. Then the next day a fox had chased the chickens around the inside of the run but the fox was on the outside. It had not managed to get in. Is this form stress? I have pictures attached. Thanks!