I moved my 3 week old + Cornish crosses outside Friday, but I still have them free feeding. I know its time for 12 on 12 off, but we had a frost last night, and will again tonight. Does eating help chickens keep warm? If it does, I'll wait another day to pull their feed. If not, they fast tonight. I lost most of my beans last night. I had 2 - 30' rows planted. Everything else did fine, including the birds. The heat lamp was popular.