I may need to remove the other water sources. I got a waterer with nipples that I can plug in for winter. I thought I'd start getting them acclimated to that before it got cold. I held 3 or 4 of the hens and helped them drink from it when I first introduced it. I had to be gone for a few days, so I kept the other water sources in there too, since I wasn't going to be able to monitor them and work with them. The other water sources they seem to be emptying, but not the nipple waterer. Today one of the nipples looked wet, so I'm hoping it's because at least one of them is using it. Tomorrow I'll remove the other water sources and do a little more "training" and see what happens. Thanks for the advice!