my pups

I get it now, thats what has been messing with me, thinking guys are just outcrossing on there seed stock if you will and not keeping some full linebred dogs off to the side. I have a good friend in his late 70's who has bred game chickens and has the same blood from when he was 14 and that is how he has done it with some variation of outcrossing in degrees but always keeping some full bloods around for vigor as he calls it. I was not sure if it worked the same with dogs. I still wonder how far away from your dogs does another dog have to be in order for it to work as an outcross, I would think a man would only want to go as far as needed away in order to cut down on his culling later on, would you agree?

Thanks alot and I would still like to see a diagram so I could go back over it all later on