One of my BO pullets has a large black/purplish mark on her beak this morning. A beak is cartilage, right? I didn't think it could bruise. With all the snow, they haven't been going into the pen/run as much, so maybe they were fighting. I'm going to get a flock block today to occupy them. If it's not a bruise... could it be frostbite? I have no idea what it would look like. Her comb looks fine. The temp is the coop is generally about ten degrees higher than it is outside, so I'm thinking about 25 degrees. Any thoughts are appreciated. Thanks.