My hopes for a black bantam silky runner have been dashed! I just found this article by Chris Ashton at http://www.smallholder.co.uk/poultry/1103049.bantams_can_make_good_pets/ She wrote, "In theory, any large breed such as the Aylesbury, Rouen, Orpington or Pekin duck could be made in a smaller version. In fact, with the very distinctively shaped breeds it would be difficult. It can only really be done where the bantamized version aimed for has an average duck shape - no extreme keel or blocky body and no upright carriage. In the 1950s, bantam runners did seem to be a possibility but unfortunately disappeared from the news. It does seem to need the genes of the little Call duck to bring size down - and that sort of cross-breed would not keep the shape of the runner. It would be a very long route to achieve the 'bantam runner' goal."