hen becomes rooster

We got several baby chicks from Tractor Supply in a mixed bin. They were mixed with sex and with breed. This is the only Barred Rock or at least I think she is a Barred Rock. I’m a new chicken mom. Will you please help me determine is she is a pullet or a cockerel? She will be 4 weeks in a few...

I bought 8 chicks this spring from a farm supply store. They were supposed to be Rhode Island Red, Buff Orphington, Silver Lace Wynndot, and Auracauna. They were all labeled as pullets. One "hen" got bigger than the others and began bullying the rest of the flock, one to the point where she...