Half a croissant, on a plate, with a sign in front of it saying '50c'
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I think this would be a great thing to not do.

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Canine Friendly "Horn"

Inaudible high frequency constant horn
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If every car constantly emits a high frequency tone beyond the range of the human ear but audible to dogs, I believe canine road accidents would drop dramatically. Perhaps the frequency could be varied to stop other animals running across busy roads to their deaths.
brewmaster, Mar 28 2002

(?) Electronic Deer Whistles http://deer-whistles.com/deer-whistles/
Allegedly work to keep deer out of your car's way . . . Might work for dogs, too. [bristolz, Mar 28 2002, last modified Oct 04 2004]

(?) Conclusions on Deer Whistles http://cru.cahe.wsu.../eb1677/eb1677.html
He's talking about the non-electronic kind (I think - based on the illustration). According to this report, deer whistles also work on elk, moose and dogs. Or should, except they don't appear to work at all. [waugsqueke, Mar 28 2002]


       Deer whistles?
bristolz, Mar 28 2002

       Baked. I've seen these advertised in hunting magazines all the time, supposedly to repel deer in the roadway.   

       But also, I wonder if this wouldn't drive pets to run away, especially if your house is by a busy street.
lumpy, Mar 28 2002

       To the animal in question, the busy street would quite literally be a "wall of sound" if this idea was widespread. This might prevent escape. How dogs are to travel in cars is a tricky one though.
brewmaster, Mar 28 2002

       There is also an issue as to how they would be able to grip the steering wheel.
prometheus, Mar 28 2002


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