The only way to know if a litter is capable of grafting is to see the parents graft,ill guarantee the majority of Bedlingtons advertised as working bred the owner will never let you see the parents in the field and the reason for the majority of that is they are fecking useless workers,the minority of the time the owner of a grafter can,t be arsed with a stranger in their midst.Id struggle to prove a worker by the look of the parents.
you take him out and show him your beddys working then.
Been there and done that,bred a litter and gifted pups to folk that seemed genuine,gave others pups t