I have lamped and ferreted with my own purebred collie/shepherds and caught many bunnies, i'd say they only needed a little more pace and if i wanted to breed a hunting dog, then the coursing dog does add pace, more than enough for bunnies but also many more attributes the greyhound doesn't. just my opinion........
Yes you can lamp rabbits with a slow dog but knock up a few bunnies in the day,even at night its not much fun watching rabbits bounce of fences to be caught..Your adding the Shepard to get the other attributes,some in the litter will be faster than others for the slower ones that