I just got 4 English Orpingtons. They are 2 weeks old and One is already starting to fly and 2 of them are kinda taller. Does this mean anything?? The breeder checked them by their wings and their vent (something about a lip on the vent). Can some one help me out. I can post pictures throughout. Also is it common for them to have bad balance? One stumbles a lot. AND can they have treats..... one ate a worm. The yellow one with black wings started to try to fly today.