I know of some good working line bc breed to work cattle they even heel & bite well. Actully my horse rider mentor swears by them & uses them as yard dogs at cattle sales. I know his are reg working dogs but not sure about pedigree reg but they are a little larger than your average show bc & all have a medium lengh bc coat & many have a little less white than a show bc. He dosn't breed his hardly ever & rarely dose he part with 1 of his own but I thought you'd like to know that bc that work cattle well do exsist.
Myf's right they are sheep dogs though so you really have to find a breeder that specilaizes in them I guess.
If pedigree rego is important to you they may be harder to come across but I have known of a few reg bc that work cattle well but some see it as a fault as the ones who works cattle well rarely work sheep as well as they are too bitey & close.
Dogs make everyday life enjoyable...........