Like Tomo ,i've had all sorts,bucks and does ,big and little, my take on the question is ,if they don't kill ,they ain't much good, i think a good killer will get stuck in and shift rabbits , them slow plodders seem to wander round the top layer of a set and bolt stuff by bumping into them , a good ferret will get down into the guts of a set and give some stick out, how many times have people been out ,tried a so called good ferret in a set ,see it bolt nothing,then try a proven killer ,and bolt two or three,out of the same set , i know i have ,this time of the year ,the rabbits are starting