our vet has put up notice regarding the increased amount of dogs turning up at practice with prong collars and advicing against the use of these on family pets .
dont know why people are using these out and about as they are only training aids
if used by an experienced trainer these are ideal and do very little harm if any to the dogs
we have used them on a few dogs at training but only because we have a trainer who is experienced in the use of these and a ten minute sessions on the 2 nights training it was not required again on the dogs