To make a looooong story short. There are different degrees of gameness. It's one thing to quit on all four for no reason. While being counted out after a hard battle while in shock, or just desoriated is a whole other story. One man might scream cur to such a dog, I won't. To make it easy, keep and/or breed only to dogs that are game ENOUGH for your standards. Very few dogs are dead game, and how could you breed them after that?