I have 4 cute little eight week old barred rock hens and didn't expect to bring home any additional chickens. I decided to buy four more nine month old hens because I was told they are already laying. I don't know what breed they are but they are a mottled light brown and lay green eggs. They are all now together in a 20 foot by 12 foot pen and seem to be doing very well. I was worried they would hurt or harrass my barred rocks but they seem fine together. The person I got them from had WAY too many chickens crammed into a small tractor. They said they were selling a bunch because they were overcrowded. They free-range the chickens in a tractor. They don't seem social like my four girls who have been handled daily from the time we got them. Also the new girls are missing a lot of feathers on their back and butt from the other chickens pecking them. The feathers they still have are also pretty raggedy looking. When I saw them next to my healthy, fully feathered, calm and docile little girls I realized just how sad and shabby these new girls look. How long will it take them to grow back the down and feathers that have been plucked? I put ivermec in the water to treat internal and external parasites. Is there anything else I can do to help them flourish? They look so sad.