I put the egg back under Mary last night late and the chick was still alive this morning, but then she left it again for a long time to take care of the other chicks. About 1/3 of the shell was off, but the membrane was not broken. There was a very small amount of blood under the membrane still, so I brought it to the homemade incubator for an hour or so, kept it moist and warm, when I talked to an experienced friend of mine who talked me thru helping the little guy to get out. It had absorbed the yolk and was breathing very shallow, was very tiny, though, and took up the entire space in the tiny egg and was missing an eye. It's head wasn't in any position to be able to pip at all and I know this was day 23, so it seems like it just didn't have much of a chance. My son buried it and we went out to find that Mary had the 6 others out and about already and they are doing very well. Thanks for all of the well-wishes and advice!