Hi there to all. First time poster and new to the chicken world. I sure do love it. I have a few chicks. 2 are 3 weeks old. One is a silver laced wyandotte and the other I think is a silkie. It was a freebie. The I have three 6 day old chicks. 2 red frizzles and one d'uccle. How old do they have to be to know if it is a girl or boy?? I cannot have a rooster due to neighbors. I have a small flock outside of 5 hens and 4 pullets. Each one is a different breed with a couple of same but different colors. I have been reading lots of post and have learned lots so far. I am so glad that I found this site!!!!!!