QUITE AGREE FIRST LOOK AT THE GROUND YOU WILL BE RUNNING YOUR DOG ON,IF ITS FLATLAND,ARABLE,OR SHEEP PASTURE,OR GOLF COURSES,THE RABBITS WILL BE RUNNING JUST AS FAST AS SOUTHERN RABBITS THERS NO DIFFERANCE,SO YOU WANT A DOG WITH PACE IF YOU ARE OUT MOST OF THE NIGHT ON ANY GROUND YOU NEED STAMINA,IF YOUR UP ON THE MOORS A TALLER DOG IS A DEFINATE ADVANTAGE,ONLY YOU KNOW THE GROUND YOU WILL BE RUNNING MOSTLEY SO MAKE YOUR OWN CHOICE,WE RUN ON ALL SORTS OF TERRAIN AND USE WHIPPET TYPES,YOU CAN SEE A REALLY GOOD WHIPPET-LURCHER RUNNING ALL SORTS OF GROUND IN THE FILM ROUGES SHE IS A CRACKING DOG,