Does this really work?

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I have them, and it is my opinion they work very well. I don't care what other folks say about "any blinking red light will do, put up Xmas lights, raccoons are color blind, yadda yadda yadda."

B.C. (Before Chickens) I had a nightly predation problem in my koi/goldfish ponds. The ponds aren't all that much, nor were the few koi, but I built the 2 ponds myself, raised the fish from little bitty feeder fish (koi in the goldfish tank) and was really upset when a raccoon decimated the population and tore up the pond plants. Nightly. I put chicken wire over the ponds, looked like crap. Finally just left the mosquito fish in there, and added a couple cheap goldfish every now and then. But the nice big fish I'd grown were taken.

Then I got into chickens. Saw the NiteGuard units, thought, hmmmm, why not try 'em?

Suddenly the raccoon evidence was gone. No pond plants torn up looking for fish. I mean, totally. And I have "regrown" some very large and tasty looking goldfish in the ponds.

And since I have had chickens only since October 2009, I have not lost any to night-time predation. (My few losses have been to misadventure, mostly.)

I have also seen newer units by another company, which sells units with TWO red blinking lights, more like eyes. Don't know if it would matter, but they were a tad cheaper and I am expanding my run, so I will buy some of those to supplement my NiteGuard coverage.