Hi, everyone! I just brought a couple new chickens into my group, three black sex links, and I thought they looked a bit dull and frumpy, but they were otherwise OK. Now, one of them lost a lot of feathers around her back end, and the few that are there are covered in what looks like fine white dust. At first I thought this might just be wood shavings or she got pooped on by another hen and it crusted, but it's gotten worse. The three hens are now rather inactive, and one of them is loosing feathers on the back of her neck. Do you think this is external parasites? Also, two of those hens got viciously attacked by my rooster (he was starting to attack everything in sight, so he became a very tasty dinner last night) and their combs were open and bleeding. The wounds have closed and they don't look infected and they're scabbing over. The stress certainly didn't do them any good, but they're fine. None of the other hens look like they've got this 'mites or lice' problem. Here's a couple questions about lice and mites that I need an answer to very quickly so I can take proper action. 1. Can chickens transmit lice or mites to humans? 2. It's winter now... Will that kill off any parasites? 3. What are some organic medicines that could help if my chickens do have parasites? 4. How can I prevent something like this in the future? 5. Can you eat a chicken with external parasites?