Black buckskin is the term generically used here in Australia to describe a single copy of cream acting on a genetic black. Smokey black is the term used elsewhere in the world for the same thing. Bit like taffy (Aust) and silver (international). If you subscribe to the theory that a buckskin is a black base with at least one copy of agouti + a single copy of cream then you would use the term smokey black in preference to black buckskin. If, like Jeanette Gower, you believe that a buckskin is any black base carrying a single copy of cream irrespective of whether or not there is agouti present then you would use the term black buckskin. BEB, colour registration is entirely your choice. It always amuses me though that people are quite prepared to utilise the 'expertise' of colour breed societies as in requesting advice and information about colour or how to feed to get the best colour etc yet have no intention of actually registering anything with them ........... And that is NOT a dig at anyone, just an observation borne of many years of first hand experience.