hi , i have just got some new permission 3500 acres of ferreting just starting out.. i have been a couple of days now once last week and caught 15 rabbits , and been there today and cuaght nuffing not one even bolted , netted all the earths up and nuffing out of none of them went around 4 or 5 sets .. does this mean they are dead sets i couldnt work it out as a few of them looked fresh and had fresh droppings outside , if anyone could help would be great thanks