Thanks for all the tips. I washed them under the faucet and it took a while, but came off. I also got some advice on their MHP and lowered it, and moved them into our mudroom from the garage. I think they were too cold. They have ACV in the water and are doing much better, only 2 had pasty butt yesterday from the original group. Interesting that our Buff Orpingtons haven't had it at all, seem really happy and content, but the Barred Rocks and Silver Laced Wyandottes have all had it and are high strung.