If your dog only lamps, then your only dealing with one rabbit at a time, so bringing live to hand is a good trick. But when your doing a hedge on your own, and rabbits are bolting, you need a dog that can go up a gear and put them away quickly and move on to the next. Other wise, when the land owner drives past the ground you say you've cleared, and there's rabbits sat out eating his crops, your going to look a twat.