It would depend on where you live IMO. Most x crosses can catch rabbit and fox, but its the hares where they can come unstuck if your living in the fens. If your mouching about hunting up, then most lurchers can kill a hare, but if you've been invited for a days coursing then unless you've got some saluki in there, the only thing you'll be bringing home is a truly knackered dog. Though you do get the odd exceptions.