I have two Orpingtons that are 5 weeks old. Both were the same size when I got them as day olds, both are feathering in at the same rate. Over the past 5 weeks "Onyx" has become twice the size of "Baby". I have noticed that Onxy will jump up to roost, chairs, ect., but Baby can't or won't. Baby will rather sleep on the ground(Of course I don't let them!) than jump even 3 inchs in the air to get on the ramp to the brooder. I have also noticed that Onyx has been pecking at Baby a little bit. Could I have gotten a bantam? If not, should I do something to help it grow some more? Any help would be great.