I noticed yesterday that one of our 3 week old chicks was acting funny. We put them with the mama hen out in the run for the first time and they all seemed to enjoy it, but this one kept sitting down and falling asleep. Other than that she looked fine. I'm pretty sure I saw her eating . We just switched them from medicated chick feed to grower crumbles, because we ran out of the chick feed and also because we live on an organic farm. I moistened it the first day but yesterday I gave it to them dry like the older chicks. There are no signs of trauma, but now it is just laying there, not moving at all or opening it's eyes. No sign of pasty butt. I gave it some water but I don't think it swallowed. It opens and closes it's beak every now 2-3 seconds and seems to be struggling to breathe ANything I can do?