I have a group of 3 1/2 week old chicks. They all started out approximately the same size. One chick is now at least 1/3 the size of the others. I've watched, and the chick is eating and drinking and moving around - isn't intimidated by the larger chicks. I've got a variety of breeds in the mix, and I'm not sure which one this particular chick is since I don't have them marked. It is either the one Swedish Flower Hen, an EE or an araucana. It could be an araucana because it has just a tiny tail. It's not totally rumpless - but close, However, the other araucana in the group is one of the largest in the group. Is it likely just a slow grower, or did a bantam possibly get into the mix somehow? Or maybe Swedish Flower Hens are very small? Any ideas? I figure the answers will come as the chicks grow and completely feather out. I was just curious if anyone had any insight into it at this point. Thanks.