I would recommend adding a portion to the top of the gate that slants in (sort of like the barbed wire you see at the top of fences for junk yards and such), but it seems likely that you just need a taller gate before that will even work. My friends have a rottweiler that is and escape artist, and the only way that they could keep him in the yard was to build a 24' wooden fence with the added in-ward slant at the top. If the gate is simply too short, your dog will climb it even with the addition. Also, chain-link is the worst thing for a fence-jumper because they can be climbed. You may want to get some of those privacy strips that slip between the links because they make it harder to climb. Otherwise, I would just recommend replacing the chain-link with wooden slat gates and position it so that the horizontal beams are on the outside. The biggest thing is to make your gate as tall as the fence that she is not jumping. The difference in height is making her escape easier.