Oh gee, we have a couple. We have American Bulldog, he is a scott, Johnson X. Extremly hard lugger and the biggest heart and doesn't like given em up. Great mate.
We have three AMB crosses, they are x with a new zealand collie, They work mostly everything, pigs and cattle. Have hard attitudes but do tend to lighten off. Also have a Bullmastiffx bullarab, Semi retired. She hAD A LITTER TO A BAND DOG AND THEY ARE GREAT WORK DOGS, BUT DO TEND TO BE A BIT HEAVY in build, must of hit the button, but not going back.
Have another bitch and she is, Neo, mastiff, great dane and probly a couple of other things, but is turning into a really good dog, will go off the ute and all that jazz. Her brother was kill mad and couldn't stock train him, so he didn't last to long.
And if we are in a hurry and no one else is there we have whatever work dog will pull them up.
Hope that answers your question, may have left a couple out, but would take all day. No we don't usually breed to many. Pups are to expensive and time consuming and the mothers tend to go ratty for awhile, and that is just annoying.