This is so funny to me because my two don't have a clue about hopping over ANY barrier in their way. There's one part of my house where the opening is way too large for a typical baby gate, so I just lay a board across the opening. It's about 18 inches high....a piece of cake for the dogs to jump over if they wanted to. But they've never even tried! They will whimper and peer over the top of that board when I'm on the other side, but have never even tried to jump it! I guess they're just dumb!