I'd say the black one is a Black sex-link (Black star or whatever). The white one looks like a mix, I just went and looked at a huge chicken breed chart and there was no breed that has a rose comb, has white shanks, and comes in the white variety. It not a Leghorn or a Chantecler, they both have yellow shanks. Hopefully someone else can help out more. Oh and they both look like pullets.