Some months ago I acquired a remote training collar for use on my 18-month old rescue Labrador who had been unsuccessfully re-homed three time before, and who had ended up in RSPCA kennels. By using the remote training collar in conjunction with biscuit rewards for responsive and/or correct behaviour, she is now a complete pleasure, and is able to run freely without endangering herself or others. She comes back on request, no longer chases deer, hare , horses or people and will stay when told to.