How bout some well bred Cur dogs that are actually hog dogs. That way when you breed a hogdog to a hogdog, it helps create a few more hogdogs.
He asked about a cross. A bird/bull is a PROVEN cross. I'm willing to say that the average bird/bull cross will throw better pups than any other cross and breedings of straight cur dogs.
I've never had any dealings with bird/bulls but if that was the case and it was proved to me then I'd cull the Cur dogs I was using and start over. A well bred proven line of Cur dogs should just about be hard to top. I doubt the average dogs out of the cross would be any better then the average Cur dogs, but then peoples opinions of average differ majorly.