Trust me, one shock from the Invisible fence educates all dogs. Neighbors across the street had pitt/Chesapeake retriever cross that was both human and dog aggressive. I had to tell the neighbor that if attacked me or my dog on my property I would have to shoot him. Neighbor took my advice, and Teddy became a very good boy. Of course UPS or the mail lady still would not deliver to them.
Wow that’s amazing it worked even on a dog like that!! I think they will definitely have to try it!! And maybe if she thinks it is the fence shocking her rather than the humans, she might be more likely to stop trying to escape? I think it is worth a shot.

