If it lacks stamina id not breed from it,source a decent pup with stamina,false economy to breed from a bitch like that,there is a good probability that the bitch will throw progeny with her lack of wind.If it's the Bitch I'm thinking about then she is a real grafter by all accounts. I've not seen her work but heard from more than one person that she is the real deal and it would be a crime not to take pups from her.At times we need to step back and take the emotion out of breeding,to me a dog that lacks a MAJOR flaw in its arsenal,lack of wind being high up there,is not a dog id wis