I'm pretty much brand new to this chicken hatching thing and I'm having trouble already... Anyways my hen has been sitting on her eggs for a good 3 weeks. One egg was rolled out of the nest this morning and was half way hatched but it didn't make it. Now the hen has left her nest and won't return. I have the 2 remaining eggs under a heat lamp for now since they seem ready to start hatching. Anybody have any suggestions on what I can do to try to save these two?