a good beddy will add to the mix good nose,stamina,determination decent feet thicker skin.a reduction in size when put to a greyhound.fast for a terrier also a agile dog in its own right. if your quarry is rabbits there are enough good strong beddys around to produce good lurchers. speed is not everything.i have seen beddy lurchers work over a 26 year period and seen some belters. does the beddy have to be a earth dog to produce a ferreting/mooching/lamping dog?i have seen beddys mark spot on. their hunting up ability has impressed me. i think they are a good mix to a whippet/grey or greyhound