i posted this in the disease section, but havnt gotten a post back. i have two hens that are losing their feathers on their backs. at first it was just the one and i thought that maby the rooster was giving her to much attention, and then a second one started balding, now the first one is almost completly bald on her back and the secong one is not far behind. is this a disease or what, i need help please???????