Hello, I am new on here, and also new to raising chickens. I live in upstate NY on a mountain. I have four hens (had five 2 weeks ago), and I just realized last night that I have a terrible infestation of a pest. I noticed about 3 weeks ago that 2 of my girls have been losing weight, and one of them has lost her sheen to her feathers. I have not noticed anything crawling on her when I have held her. Their appetites are still great, so it has been troubling me that they are losing weight. I found one of them (who was not emaciated) face down dead in the coop about 1.5 weeks ago, and she was a young, healthy hen prior to that. Anyway, my coop is part of an old goat milking barn, and is a huge room that is half of an outbuilding, and the bedding is straw over wood pallets on cement on half (the drain backs up in winter and the floor gets wet) , and wood shavings on the dry half where they spend most of their time and where the water and feed is. There are wood shavings in the nest boxes. The hens roost together in one tiny corner, and spend most of their time there when inside. They prefer to be outside most of the time. I feed them organic feed and the always have plenty of water inside and out. I also throw them organic veggie scraps (outside). Last night, I went to shovel their poop under the roost, and noticed hundreds of gray/tan tiny bugs crawling all over me!! They were all over the poop bucket, shovel, and the roost under from which the poop was removed. The entire roost was crawling with these things! I then remembered that a week ago, I saw tiny bugs like this scurrying all over the cement where the poop had fallen (under the perch), and didn't know what they were. I sprayed the roost with soap/vinegar water and organic citronella bug spray, and the ones on the roost were dead this morning- they can also be crushed easily. I can not seem to distinguish whether they are mites or lice, and what the best way to treat my coop, outdoor area, and hens with that would be safe or organic. My 1 year old eats the eggs, and I am breastfeeding, so I want the eggs to be safe to eat, but I also obviously want my hens to live. Please help- I am afraid since it took me so long to realize this that they may not have much time!