If you can keep up with your dog to lift it over a fence etc while on a run, why do you need a dog, get yourself a fishing net !!
see what your saying pal and i agree.......but am not sure this lads on about when the chase is on..(i may be wrong) plus a 5 foot jump should be good anoth for most fences(from round these parts anyway)...owt bigger with the amount barb wire now days i wouldn't want the jumping anyway for the sake of a bunny or you chosen prey
each to the own though..