Wow -- had no idea that German Shepherds could jump like that!   That is impressive!    We may have to consider running a hot wire top and bottom like has been suggested.   
Fence planning is ongoing . . . going to go wander around Lowes/Home Depot, Farm stores, and see what the options look like as described .  May have to build a house for the geese / ducks to be stuck in at night or I'll worry anyway.  There's quite a coyote pack howling around here at night . . . but not thankfully the massive dog pack running around Eastern WA.  Whew.  
Going to measure and mark locations for posts / gates/ etc, this week, and decide what we want to build.