Our Ground Stakes are used to pin a fence material to the ground. We developed them for our Purrfect Fence Free-Standing System to pin the welded wire we use on that fence to the ground. In that system, the bottom fence material is welded wire and we fold 6" - 8" of it onto the ground surface and stake that two the ground about every 2'.
If the bottom of your existing fence is not secure for dog containment, add a welded wire, chicken wire or some other metal grid fence material to the bottom of your fence. Fold a minimum of several inches of that fence onto the ground and stake it as much as you feel necessary but at least every 2' with our ground stakes.