I feel so bad! I got home from work about 5 and went to feed the chickens and their water was frozen solid! It was 20 inside the coop. I was sure 2 of the red heat lights would keep it warm enough and I was wrong. I feel like such a bad mom!! I filled up the 1gal waterer so they could all get a drink while I worked on the problem. I already had all the parts to make the heater to go under the waterer, so my husband and I put it together and tested it. It is now out in the coop under the 3gal waterer. I hope it thaws it out! I will check on it before I go to work in the morning. The girls seem to be fine with the temp, they were all on the roosts under the heat lights, but since I disturbed them, I gave them some scratch to help keep warm.