Self-sustaining fly-eating robot

Article: Self-sustaining killer robot creates a stink | New Scientist
Not quite a cyborg, but a machine that eats protein to produce its own self-motive energy is pushing the boundaries between organism and machine. I'd like to have one for camping: not only would it eat the flies swarming around the baked beans, but maybe it would also wash the dishes. But first they'd have to solve that stinky human sewage problem.