I had 3 chickens, one ea, White roc, Buff Orphington, and RI Red. The Buff was got by a hawk. It's too cold here in winter for just the two, so I got 4 more from a friend, one RI Red, two some kind of Rocs, and a "we don't know". Well, one of the new Rocs had a bald spot at the back. My friend...