Our chicks are now 6 day old. I've been seeing some get their tail feathers, more in some than others. Does this mean they are really older? Or just a breed that matures faster? I got 8 from hatchery on hatch day (3EE 2BA 3GC) 8 on 2nd day from feed store (4BA 2BO 1GC 1BCM). 1 of the BA from store acts quite differently and has feathers, rest BA that day don't have such pronounced tail feathers. All but a few have started. It's like we have late bloomers and fast maturity in one flock. Is this normal? Mind you; this is my first flock as you probably can tell.