Last week we lost electricity for 13 hours and I had eggs in two incubators. They got down to 70 after 4 hours and my husband put on the generator. Well, it looks like we are going to have a bad storm tomorrow night and now I have around 50 to 60 quail chicks from 4 to 1 day old. They are in the brooder out in my shed with heat on them and I can't bring them in the house where the generator will be operating if necessary. Can I use a propane heater out there to keep them warm? It is suppose to get down to 29 degrees tomorrow night.