I think the other people are right- those might be the light sussex chicks-
Not my birds or I'd be rolling in cash right now!
And yes- Orps do have white legs (unless they are BBS) but so do Sussex!
Haha joebryant!
They look like buffs. Cute- but I don't think they'll end up being chocolate. Try posting this in the genetics forum- maybe one of the experts can shed a little light.