Only real bother i get is on a big coastal farm , it gets poached a lot the number of nets i find on holes . But i think these guys honestly dont use enough ferrets to go deep and bolt them and once the rabbits learn to sit tight and the ferret leaves them they will do it again and again . I start with a good number of ferrets and after 20/30 minutes add a few more , and then the spade comes out but once youve located the ferret and took the top spit out check it again with the locator as the rabbits nerve goes and it moves and if it can get away from the ferret might bolt