Being new at this I'm not sure what is going on. My flock consist of 2 Buff Orpington one has a lot of feathers missing on her back 1 Black Australorp feathers missing at base of tail a Golden Wyandotte no missing feathers I think she is the top hen and 1 Bard Rock she is really beat up They have plenty of room the run is over 200 square feet the coop 64 square feet they free range at less part of every day. Egg production is down with 1 egg one day and 3 the next some times 4. they are active eating drinking comb and wattles look good. I have tied blue coat to cover wound vicks , Peck No More lotion, udder cream nothing works. Any help will much appreciated.