X2If they freeze, she will not be able to hatch them. The eggs might crack and or burst open. Eggs here freeze and crack open at 30F if not collected with in 1-3 hours after laid. If and when she starts setting on the eggs, check them daily for cracks, and candle them to see if any are developing. It's best to check her nest when she is out eating. It's always best to give the benefit of the doubt!