I have a small flock of 30 birds. I been raising them for 8 months. I have 13 white rocks, 1 WR roo, mix of black star and brown sex links. They have been excellent layers. Sell enough egg to buy there feed. From the get go I have had a problem with them losing thier feathers. I have tryed many things. could have been bordom built them a 200 sq foot run to play. Could have been a lack of vitiman K, they eat more green food then we do. could have been lice, mites ect. ok lime in nesting boxes every weeks with new bedding and Sevins 5 in dust baths weekly some times the feathers appear to be growing back in and they in a day or two the new on are gone. the black and brown are under weight but most of the WR are heavey with less feather lose. they eat well with dumor16% layerfeed, cracked corn and scatch grain.They are really really mean to each other. (way beyond the picking order) If the roo mounts one of the hens the others peck the crap out of it. they chase after each others and pluck out feathers and eats them. Last night i came home to a dead chicken, with a large hole in her leg. It was like it came out on no where. Everyday when I get home from work I feed them a lb of feed and fill one or two for there dust baths with water for them to play in they love the water. They also get lb of food in am and the have a 7 lb feeder that is full. I am not sure what killer the hen i am questing the the infection was to much to hadle. One more think the WR were vacinated from Ester Hatchery and the BS and BSL were not, but they came from Ideal Poultry. so if any of u have any ideas or a vet that will look at one of them please lit me know. I live in brooksville 1 hour north of Tampa.