My wife had this great idea to get some chickens last year, It has become my favorite hobbie. Last year one of our chicks (Buff Orpington) was much smaller than the rest and didn't get feathers on it's back till long after the rest of them did. That is the one that ended up being the rooster and it was smaller than all the other chickens till about 6 weeks. We got 5 more chicks about 3 weeks ago and I am noticing the same slower feather development in two of the five. One is a Road Island Red and the other is a Silver Laced Wyandotte. Is this slower feather development on their backs around 3 weeks a sign of having a rooster?