We have a batch of 5 day old hatchery chicks and one of them is incessantly crying out with her stress chirp. This is our fifth batch of chicks over the years, and the first time I've had a chick in quite this much constant distress. She has struggled to learn to eat and drink, and her balance/mobility is not up to that of the others. She is also so, so tiny compared to the others. We have seen her drink on her own, and my daughter claims to have seen her eat on her own. But she isn't going to the food like the others, and has only a weak scratch and peck. This morning when I turned on the lights, she was away from the others on her back and unable to get up. The five other chicks stepped on her several times before we could get there. Her feet were moving. My daughter picked her up and set her upright and she was able to stand. We gave her water from a dropper which she managed and then was perked up. These chicks have had mareks vaccination, we have electrolytes in the water and they are on medicated chick starter. My instinct is that we just to wait and see how this goes, but any suggestions would be very helpful. Of course it's always the one who is struggling who gets named 



