At 4 weeks old, all 7 of my chickens are the same age, but two are half again bigger than the rest, 1 being a welsummer and the other being our only Silver Laced Wyandotte. All 7 get along fine except when I walk in with treats and then it's a vicious fight over the goodies. I posted pics of the welsummer and people confirmed she is definitely a she and the silver laced is definitely a she too. Just kinda funny how their so much bigger than the other 5. Also...if a chick is skiddish at best of you at 4 weeks old, what's the chances they will be ok with you as an adult?