TBH I have been guilty of being dead against adding pure grey blood in the past.
I had this greyhound bitch on the yard for about 6 month before I decided to use her, she was exercised like a lurcher doing up to five mile behind the quad a few times a week, in the back of the 4x4 for nights out allowing her to get a mouthful of stuff. She settled and turned sensible after a few knocks, very obedient and a pleasure to have around. Her pups turned out fine apart from being a bit lighter boned than I am used to.