Okay, first, perhaps my title is not clear but I didn't any other way to rephrase it! ;-) So, I ordered chicks from MPC, hatched and shipped on March 26th (faverolles, orpingtons, sussex, and brahma). Also, on March 27th/28th a broody hen hatched out 7 chicks (mixed breed, all large breeds). So both hatches are only a day or two apart. But the MPC chicks living in the bathroom are growing big, have wing and tail feathers, practicing flying (!) and are much larger than the broody hen chicks. I would think the broody hen chicks would be at least as big if not bigger, since they have the advantage of also foraging with mama for bugs, plants, worms, etc. They are all fed the same feed. Yet the broody hen chicks barely even have wing feathers. This doesn't make sense. Any ideas? Thank you!