I owned a non ped racing whippet, from national champ parents who raced at a track at a local(ish) miners welfare club.
he was strong and keen on rabbits, He wasnt the brightest but I trained him to a acceptable level for working.
he was an exellent ferreting dog due to his acceleration but lacked stamina for hares. The only problem was that he was too quick, usually greatly over-running quarry when it turned and got himself injured a lot hitting fences/gates etc..