We bought one of those metal vacuum waterers and the chookies really like it. Also, we bought a heated base plate thing that switches on at 35 degrees to keep the water from freezing. It says not to use it outside, but I have always been hesitant to put a waterer in the coop because of the moisture and possible/probable mess. So my husband says we have to use it inside the coop, otherwise it will stay on all the time (we live in northern Wisconsin). Any tips or recommendations? I don't want to deal with a sopping wet coop all winter long. It's not heated, except for a brooder lamp and their own little hot selves. So far it stays about 40 degrees in there.