One of my chicks (Buff Orpington 1 of 2) is smaller than the other chicks her age. The Easter eggers are huge, and older, so ignore them in the photo, but the yellow chicks are all similar sized except her. She's active and acts normal, just is smaller. I guess that can happen? Thankfully they're all good nice to each other and don't pick on her. Just wondering how common it is to have a runt chick like this.