However, to claim as did that German breeder, &if, after several generations of purely sable-to-sable cross-breedings, a [B&T] combination is made, no loss of pigmentation will occur, it aint necessarily so. The B&T could be less than well-pigmented, and if he didnt have better genes for producing deep pigment, especially in the phaeomelanin-influenced coat areas, you could still be taking a step backwards.