7 weeks ago, we got 2 white rock chicks. They were kept in a cardboard box brooder and the lamp was raised a tad higher every week or so. Then by using an old farmer's trick, we figured out that one of them was a male, and went to return him. We couldn't keep just one because she got so lonely, so we got 1 more same breed and age, but then my little brother and cousin wanted new hatchlings. So of course, we got them. The brooder was changed into an old guinea pig cage and the sides are only wire. We put the lamp all the way back to the beginning for the young 'uns. The big 'uns just kind of stayed on the outside and adjusted. After a week of having these new chicks, one looked sickly and died the next day. Then another one looked sickly and died the next day. The big 'uns are ready to go join the coop with the big big 'uns. There is only one little 'un left. Are they sick and should we take them all back? The big ones don't seem sick, just the newer big one lays down more often. The little 'un will be lonely if we put the big 'uns in the coop. What should we do?