simple fella, if you want working pups that are dark and around 20" i would look for a working black 20" whippet i wouldnt worry about the kc bit but i would make sure it was doing the business
by the way 35lb at 17,5" is one heavy dog
35lbs at 17.5" not particularly heavy for a staffie.
Blackstaff I've a 1stX headstrong, works the heaviest of cover, reed, heather, ferns, bramble, and blackthorn, stamina bottomless still going when the others have moved on, fast and agile enough to catch rabbits on the run, show her a ferret and completely focusses on the job in hand tip toeing over a