It's not a one size fits all when it comes too catching hares a good dog could get lucky and take a good hare out in a minute or it could get dragged around for 5minutes.
it's just a coincidence that yous boys don't run any weak hares and week in week out it's taking yous 5-8 minutes too kill a hare. Funny Marcus is always saying the hares are shit these days compared to back in the day lol it must have took 12 minutes back in the day to kill a good hare.