imi, at least you would entertain the dogs (the crashing part I mean) as most of them are just bored to tears when we click on their "predator-prey" instincts. I sorta feel sorry for them if you stop and then they are back to being just regular old Fido living on the farm with a car an hour or two going by (and not "FIDO the great warrior, chasing down a bounding buck, about the provide food for the whole dog pack")