I have a flock of 5 week old chicks. They are all doing great, thriving, save one. The second to last to hatch (third day of the hatch) and I had to help it out. It is an Australorp that my daughter calls "Shiver". I kept it separate from the others for the first couple of days so it could gain some strength to hang with the big chicks. It did fine. In the last 2 weeks, though as the others have really grown and feathered out, Shiver has stayed small and is still very downy. It looks like a 3 week old chick next to its 5 week old flock mates. Shiver is extremely spunky and seems to be doing well other than size. Should I remove it to feed it separately? Here are some pics for reference. Shiver standing, is the same height as the others when they are sitting!