I have a broody girl sitting on eggs. This is the first time I've had fertile eggs and haven't broke the hen. How long can she leave her nest without the eggs getting too cold? She's in her own little area, but she's left a few times when I opened the door to dust bathe and eat/drink. She's only been gone from them 30 minutes tops. When she comes back she wants to sit on the nesting box eggs, not her nest, and I have to move her. We are on day 4. I'm in GA so it's still pretty warm here.