i have a pedigree whippet (sooty sam lines ) and a non pedigree( racing lines ) the ped has got a better nose and will go through anything where as the non ped is much stronger. i use the non ped for lamping as it seems to be able to take the knocks better the only trouble with peds is they dont like the cold much as they have a very thin coat dosent bother them when they are moving about but they look like they are going to shiver to death when ferreting