Hi, We live in a busy suburban neighborhood and have a 2-year-old female German Shepherd Dog named Quita. With our Dog Guard fence we can let Quita out in the yard where she can keep an eye on things for us (and let us know whenever another dog walks by). It was particularly nice this cold winter when we could just open the door and let Quita out first thing in the morning rather than put on a coat and boots to take her for a walk.=20 Our cat learned quickly that Quita will not cross the fence, and he appreciates being able to run outside the fence and sit in the woods and watch the dog watch him. Quita soon loses interest in the cat and wanders off to chase squirrels. Quita doesn't cross the fence when tempted by the squirrels, the school bus, bicycles, other dogs, or when my husband mis-throws the frisbee and it lands in the road. She just runs to the edge and sits and waits while Gary fetches the frisbee and throws it again. Passers-by are impressed that she stops, as she is an avid frisbee player. We chose Dog Guard in part because of Dave's experience with German Shepherd Dogs and his assurance that this breed can be trained to stay within the fence. He was right! Dave has a very nice way with dogs and he did not assume that our dog needed a strong correction just because she's a German Shepherd (as did a rival representative). In fact, our dog needed only a small correction before she realized she didn't want to cross the fence. We're very happy with our Dog Guard fence and would recommend this brand and Dave and Alex Spain. Thanks for making suburban life possible for our dog Quita. Lisa, Gary, and Sophie