we use mother n father a lot, they will goto ground all day long, no matter r big or deep it is, they luv goin darn them sets, an they both bang on markin dogs, an last lot of pups r all brill werkers and r all marking brill aswell so decided i wa gona av 1 of pups this time, but cheers, an 4 them who sed they wudnt av a x, im sure any good werkin x wud b as good as any pure breed