So I had a random weird thought the other day- Could you heat up an oven stone and use it to keep the coop warm at night? My sister broke her stoneware oven pan and I was wondering if I heated the pieces if I could put them in the outdoor brooder to keep the chicks warm at night. I have no electricity in the coop and running a long extension cord for a heat lamp makes me nervous. I'm trying to think of ways to keep the babies warm at night (temps in the 20s and 30s) when I move them outside. The chicks wer hatched in late October.