I went out and heard frantic chirping coming from the nest that had been abandoned. (posted earlier about the unexpected dozen.) Found a chick struggling to get out of the shell, and when I picked it up it fell right out. Mom hen won't have anything to do with it. I brought it in and it's in a tupperware container (a huge one) with a heat lamp. What temperature should I be going for? And when should I expect it to stand well on its own? I am really at a loss here. Advice appreciated, especially something about what to expect.