1st question I d ask my self is do I have enough work for another dog. Then is the bitch honestly good enough to breed off. If you know of better bitches then wait and get a pup from one of those it's far less hassle. How old is the bitch , reason I ask is if she s made 6 plus without much injury then I d use a similar dog over her. If she s injury prone because of her speed and feet then put something terrier or collie blooded dog over her. Or as I said buy a pup in its less stressful.