We live in the California Bay Area. 1 week ago 1 of our three hens was killed by a hawk. Since then, our other two have not layed any eggs -- previously they'd been laying 1 every other day. Also, our Rhode Island Red is losing feathers all over. Does anyone know whether these problems are likely a byproduct of the hawk attack? Could the problems be from quite cold weather here recently? Thank you for any opinions!