Can't breed to a deadgame dog, since its dead
There is more into for sure cause also on this side of the ocean there are cur dogs which were foundational to MANY good ones.
The two most famous examples
Jumbo ROM 1x LG http://www.apbtpedigrees.com/printpe...?recordID=3697
Mr Indian ROM http://www.apbt.online-pedigrees.com...&dog_id=217345
Mr Indian ROM son (jr) was a ROM dog too, both were walljumpers.

Jack has wrote some very informational stuff about this topic, and i guess he will do it again in this tread so im not going to repeat any of it

I want to pull this piece of text out of his article: "hard culling or genetic re-direction" though
However, Genetic Re-Direction can only be achieved when you have a clean-bred family of dogs, and it can only be achieved by an intelligent person with *both* a good eye for a dog AND a solid knowledge of the gene pool he is working with. Right out of the gate, this would eliminate 95% of all dogmen from qualifying as breeding managers. They have neither the bloodline, the eye, nor the intelligence to manage a gene pool effectively. Thus I believe that 95% of all dogmen should not breed dogs, they should just get small yards and “drive the race car,” but not attempt to manufacture one.