I have 4 roughly 2 week old chicks, two chipmunk EEs, and two BOs. They are living in a small animal cage (probably have to move to a larger cage soon, I swear they got larger overnight!) and seem to be adjusting well. A couple of times, I've noticed the EEs playing what looks like keep-away with a wood chip. They'll sprint around the cage carrying it in their beaks, and seem to be looking for someone to chase them. Is playfulness normal for chicks? Is it breed-related? Newbie to chicken-keeping, trying to figure out what to expect. Thanks!