Hi Anne
Thanks for posting. I don't know about the red eye device, but this sounded cool:

Contech CRO101 Scarecrow Motion Activated Sprinkler

Contech Electronics scarecrow motion-activated sprinkler for humane animal deterrence
Scarecrow detects and sprays animals in a 1000-square-foot area day and night
Lightweight plastic shaft; metal sprinkler head
Includes sprinkler mount and motion detector; 9-volt battery not included

Seriously, an electric fence might be a better approach. A few strands of wire close to the ground, should scare off animals, without hurting them. 

PLB

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