Two of the chicks that hatched today are dead--one I saw come out then the mom got it under her and next I looked it was dead. Another one with barely any shell or membrane is dead--under her. Another was about to emerge--I kind of helped and now have it under a heat lamp and it's alive. I see one under her that has no shell, must'y membrane--should I take that one and try to help it out and put it under the heat lamp. This not turning out as I had hoped. Please help!