It's extremely difficult - if not illegal - to beat an analog dog. Probably the best security available. Cameras are helpful, and discouraging to fiends if visible. Motion-sensing lights are almost mandatory with or without a dog. A motion-sensing notification (auditory) device can be helpful too - something with a gentle beep. If your intuition is sharp and you can forecast the event, a sixpack, pellet-rifle (or paintball) and camera can be divine. But the question failed to mention circumstances, environm