I'm a new hen owner. I got three beautiful birds from my friends mother last week, a RIRed, Barred Rock, and Black Sexlink. They have given me three eggs a day for 6 days running! But here's the deal, originally my friend had offered 6 hens from her 30+ flock and I built my coop accordingly, but then once I went to pick them up, I learned that the family dog had killed a few hens and so she was nervous to give away too many. No problem, but I was afraid that since I live up near Lake Superior, my hens would be too cold in their big coop. So I got a few more hens from someone else. Here comes the problem... I added the hens at night and the next morning I noticed that the new hens had lice. not wanting my beautiful chickens to pick out their feathers, I quickly pulled out the new infected chickens and butchered them. (heartless I know, but The person I got them from would have done the same if I hadn't taken them.) Anyway, my question is this. A few days later, I can't see any sign of lice on my birds yet, but should I treat them with something just incase? What are the chances that the new birds infected my birds overnight? I don't want my birds to pull out feathers and get cold. but I also don't want to bathe them in chemicals if I don't have to. Thanks for any advice.