i know loads of whippets that can do 40 a day ferreting were i live for the full year you wont find werse ground and whippets do fine the racing whippets may a bit fast for working hence have a increased risk of a bump the working lines seenm to do ok ive never seen a whippet die though runing however about 30 40 years back my mate had one die with the cold when out but its womer these days lol