Oh boy, do I feel your pain on this one!! We got a beagle about a year ago from a neighbor who was going to dump him in the woods because he kept getting out...I would too if I were kept outside all the time. We got him, got him neutered, and things were looking better, but he still had the wandering urge, and in the process taught our Toy Eskie the escape routes, so we went and got railroad ties and put them around the perimeter of the fence...and there you go...no more escape routes!! It's been months now since we've had to go driving around the addition yelling for Billy. All of our neighbors know exactly where he lives now!! lol

Oh and btw...you haven't lived until you've had 14 dogs get out at once when you are late getting out of the house to school and have to drive all over God's green Earth to get them!! lol

Good luck and let us know how it goes.