The dog that our neighbors lost was half GSD and half Beauceron (large french working dog). A tough dog that other dogs and people generally left alone. He had been chasing coyotes on early morning walks with his owner. The night he died he got through an 8 gauge chain link fence gate, around 50 lbs, wired closed. Then he got over two 5' fences. He was apparently after the pack that roams the valley at night. I found the body a few days later. There was damage to head and hind quarters. He had retreated into a hard to reach area, where he could protect his rear, but apparently died of his wounds there.
Another neighbor was walking with his, very large, GSD in the woods in the same area in the late PM. A pack of Coyotes went after the dog. Classic case of one or two animals trying to keep the dog occupied while the others did their best to "hamstring" the dog from the rear. The dog survived the wounds to his hind quarters, with the help of his human master.