im 14 and been ferreting for a 2years.ive been told to work ferrets from a year on so their fully grown and wont get beat up by the rabbits.(trampled) otherwise they wont go down for you. as it is i go ferreting as often as i can with mates. we just net up the holes and enter the ferrets. NO locators at all. all we do is stand back with a good view of the burrow for the ferrat to come back out. my jill has never lay down with a rabbit always bolted them.
hope this helps jarrod