I have never been able to figure out what mother nature is thinking.. when she has hens lay eggs in February!! they freeze.. crack... What makes her think that those eggs would be any good for a hen to set on and hatch? Chicks would have a hard time living.. IF they even were able to hatch.. during our february and march temperatures. My question is.. what temperature is TOO cold.. to keep eggs and try to hatch them in an incubator?