A cold bitch can come from any line, loose or tight. Hell (historically speaking) I've seen more cold acting bitches from scatterbred stuff than I have tightly bred stuff....but that's just my personal experiences.
Cold in the historical bulldog world meaning that they never 'turn on'/show any kind of dog aggression whatsoever.
now that I know the meaning of cold bitch in the game dog world I can see that what you are saying is right...open breeding (scatterbred) normally produces a higher cull rate...line breeding with a small amount of inbreeding as long as the dogs used are all proven dogs will produce a higher percentage of quality dogs...
But what Texashogdogs is talking about is inbreeding depression (tired blood)...that cold bitch is still very valuable on account of her heritage...and she becomes more valuable if she is the only bitch you have left...
Tbob...I do see your point...reading between the lines you are saying a cull is a cull...I do agree with that but there are times when breeding the right cull is the right answer but then that should not be often at all...strictly my opinion on that and that is what I believe...I sure wouldn't make that cull bitch or dog the hub for my breeding program if I had one...That dog would be a stepping stone to keep me moving in the right direction with the breeding program...