The crested black hen is definitely a half silkie. They have black skin (her face and legs are very black) and looks like a bit of blue on the earlobes. When crossed they usually produce regular feathers but most often keep some top-knot. She is adorable. The chickens on the bench look like a black sex-link hen/pullet, a red roo (can't see his tail to tell if RIR or NHR or just production) and a nice barred rock roo too.
