Hey, all, I'm puzzled - I have 11 hens and 2 roos. All the hens are missing the feathers on their backs due to the boys. half the hens are also missing the feathers around their vents. Both boys have bare throats - and I don't think they can reach to pull out the feathers themselves. The boys also have some feathers missing around the vents. I have checked them and checked them and can't find any critters on them. I cleaned the chicken house a couple of weeks ago and dusted with powder for poultry mites/lice. Nobody is acting uncomfortable. Combs are red, egg production is steady. They don't free range and the wire of their run is too small for anything but a hummingbird to fly through (and I think they'd eat one of those!). So exposure to wild birds is limited. Do I have a bug problem or not?? I hate to put chemicals on them if not necessary, but I know they can die from complications of bug infestations. Can anyone tell me how to find out for sure what's up? They're a year and four months old, they get Dumor layer crumbles and lots of spare garden produce. Thanks for any input!