I have a rabbit hutch, that we turned into a chick hutch. I have a tarp that goes over the whole front side of it. Nice warm heat lamp sure does the trick. I do keep the babies in for about a week first though, to make sure they are eating, drinking, and they don't have a pasty butt problem. When I know they are doing well that way, out they go. I even have some Serama babies out there right now..in a different coop, also a tarp to cover the front. Larger, because I am keeping them in there the whole winter. Like Brad has pointed out many a time, the only down side of having them out like this is, if the power goes out. They will have to come into the house if that happens. Until the power is back on..and hopefully, that doesn't happen while we are sleeping! So, I make sure I have enough chicks in the nursery to huddle up together to keep warm until I get to them. So far so good..knock on wood now.