Hello to all, Fellow chicken farmers and such, I have a situation. My chicks are three weeks old, 10 Rhode Island Reds, 5 polish, and 5 Americana. My father in law bought his chicks two weeks after i bought mine and his are a whole head taller. My fear is I was sold bantam chicks instead of standard size. How tall should three week old chicks be? Mine are about the height of a 20 oz. coke bottle. Is there any other good reference on how big my chicks should be? Thanks for any and all help!!!