Hi, we have a fiver year old lab who is in the habit of running off whenever the opportunity presents itself. He is walked lots and gets plenty of exercise but is always up for an adventure. He is a delightful beast but as we live in the countryside it is unacceptable to have him wander. We have resorted to keeping him in most of the time as even thought we have a secure garden he still sometimes manages the impossible and get out. We have had a behaviourist in and he suggested maybe to try a GPS so that if he does get out it makes it easier to find him and get him home. Can anyone here offer any guidance or advice on this and if so what tracker would you recommend? Thank you.