i was out early saturday morning with the dogs and my ferret, found a little set in a nice little hedge side, netted up stuck the collar on and off we go, no bolters at all, after half an hour tried to locate the ferret got a reading at 3ft so started digging got down to 3 ft just to find the collar . so i just sat and waited four n half hour and still nothing. tried to make a bit ov noise to see if that would bring her out but it didnt so i blocked all the holes in but one.. went back sunday still nothing . anyway time to forget, was really gutted about the loss but what can you do. anyway