I have a hen who has been with my current little flock (of 10) for several years without incident. Some/or one of the others has started pecking at her feathers and she is now looking rather sorry for herself and I am worried that she will get cold when the weather changes. They haven't drawn blood, just broken her feathers so that she has lots of visible quils. If I separate her, will they be even more horrible to her when I put her back? Can anyone recommend anything that I can spray on her to deter the feather pecker(s)? She, and the others are all in otherwise OK health. They have plenty of access to outside space, fresh air, grass, grit, food etc. I have introduced new hens this year but they have been here for at least 6 months with no nastiness shown before (and they may not be the culprits this time)
I would be very grateful for your advice please.
Many thanks