Mine will do what ever they are slipped to .three out of the four will run any land large and small, The fourth is a big land dog but pace to burn. They will run flint to turf fields and come off relatively unscathed. The ones decrying them have never had or seen a decent one run and work Spring is here and all this nonsense starts from the bull x lads who must hibernate in winter and come out when young inexperienced stuff about for them to kill.