Cancer and internal bleeding. Too much of both. She refused food a few times and went downhill rapidly over 8 or 9 days. No alternative other than to have her put down.
Saddest part of owning a dog. This is our 3rd shepherd and the maddest of the lot, determined to behave like a playful pup. This one though died at an age of just under 5. That came as rather unpleasant shock.