Tommy Steam
I don't know what unit the other poster used, but you can get a Pet Zoom at Walgreen in their "as seen on TV" display for $10. It is the best investment I ever made. Our dog will stop doing whatever we don't want her to do as soon as she hears the sound. We can't hear it as it is a very high pitch sound, but dogs can hear it and it is very irritating to them. It is a rectangular blue box and we have had it for over 2 years and the battery still is working. There may be other similar items out there but this was the most economical and easy to get.
LW888
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"A journey of a thousand miles begins with a single step" Lao-tzu
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