Foiling The Leaping Hound

While the kids and I were at the pool, Dale addressed Bo the Dog's gazelle-like leaps-to-freedom by adding a two-foot extension to the top of the gate. We have agreed that if he clears this, we're going to dress a monkey in jockey silks, teach it to ride the dog and enter them in the Olympic equestrian events. Anyone know where I can find a monkey?