one of my hens is a hybrid rir that i had from a neighbour whose entire flock was wiped out by a fox. this hen was badly injured and they didnt think she would survive but she did. She has been with my hens through the winter and it is now well into summer, but with the exception of the feathers on her head her feathers are very dry and tatty looking with no shine. could this be the shock of what happened to her or is there another reason. my father breeds canaries and he mentioned feathermite... anyone heard of this in chickens? the rest of my flock are fine and healthy with no signs of mites or lice.. she is otherwise healthy enough she just looks really rough - her comb is red and she eats well. any help much appreciated