We are from north east so its really cold up here. Our chickens free range and we leave a heat light in the coop. This morning we found a maran lying outside the coop on her side. She was so cold, we brought her in and she's been napping by the wood stove for about an hour. She's standing now and she ate a little. But she hasn't moved from her spot. How long should we keep her in, and is there anything else we should do before putting her out?