Invisible Fence* Conspiracy

by Gajan Retnasaba on February 2, 2010

This reader question is a real mystery? I suspect it is just a coincidence, but would love to hear a good explanation that is a bit more satisfying.

Have you ever heard of a dog who has escaped his invisible fence perimeter and triggered a car alarm? Last summer, I was visiting my parents. Their neighbors have an invisible fence installed (don’t know which brand). One night, there were severe thunderstorms and heavy rain. The thunder claps spooked the dog in his dog house and he left his perimeter to come onto my parents porch. Later, my car alarm began activating even though my car was not armed at the time!

It continued to activate at random intervals all night. Eventually, I ended up sleeping in the vehicle just so it wouldn’t bother anyone. Here is what I know: 1) It wasn’t the impact of thunder that was activating it–as I said, it wasn’t even alarmed at the time. 2) This reaction had never happened before this instance, and has never happened since. 3) I suppose the heavy rain may have had something to do with it, but the car has been in several heavy rains before. I am left to think it must have had something to do with the dog’s collar and the frequency of my alarm.

I Googled it, but couldn’t retrieve anything, leaving me to think I must be crazy. Any insight would be appreciated.


I have never heard anything like that happening before. Sounds like a good puzzle for “Car Talk.” It would surprise me if it were the dog’s collar, because the collars are receivers, they don’t transmit any signals they can only receive. (for more details on how a dog fence system works, see here) But I guess it may somehow set off the proximity alarm on the car?

In any case if any readers have any good ideas, I would love to hear them.

*The Invisible Fence Brand is a registered trademark of Radio Systems Corporation. This site is not affiliated with Invisible Fence.

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