One of our 3 day olds seems lethargic and isn't as big as the rest of the group. Today she has taken to laying oddly and gasping. I isolated her from the others in the brooder and gave her water/food in her subbrooder. I also dropper fed her a little gatorade and then a little apple cider vinegar/water mix. She still wouldn't eat any yogurt or watered down medicated chick food. I don't know how long she hasn't been eating/drinking because she seemed to be fine the past few days. I've ordered some chick vitamins, but I'm afraid it may be too late for her. I don't know what else to do for her. I've moved the lamp up higher so it's not too hot in there for them - 90F. Any suggestions? Notice her in an earlier pic - she's the only one not perked up.