thats the very trouble, there are far too many people with little or no knoledge of dogs\breeding that are trying to imitate M/B's breeding plan with little thought for the conciquences for the breed or the stock they are churning out selling the pups on the mythicle name "SOOTY SAM"
recently ive seen inbred SS lines (NOT DIRECTLY FROM M/B ) of 23,24,even 25" at the shoulder, surely if a dog of that size is needed then a whippet/grey cross would be more suitable rather than breeding excessivly large whippets.