PetSafe Sonic Bark Control
This remarkably light, one-ounce collar emits an unpleasant but harmless tone to correct your dog�s barking problem. The collar�s cutting-edge, bark-detection microphone can be adjusted to recognize your dog�s unique bark so that no other sound can set off the unit. This collar is most effective when used on small dogs.
Bought two for my cock-a-poos. I'm not positive but I think I saw them exchange looks and laugh.
Hesitate to try another brand.
by from 08/23/2013
We haven't used this collar consistently. The first time we tried it, our 15-month old puppy became quickly overwhelmed (within about one hour of wearing the collar).
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Bark collar by Carlos01/25/2012
The collar has minimized the barking. It does not stop the barking completely but when he barks the ringing noise irritates him and he stops or runs into the house wanting me to remove it. Better with the collar than before. Thank you.
Not worth your time by KSimpson05/30/2012
The sonic beep is not affective behavior control for barking. It is so sensitive that even a light breeze or loud noise will set it off. Also contrary to the label, it does not learn your dogs bark from other barking dogs. If other dogs are barking it will go off. I have a small dog and a large dog and didn't find it affective based on dog size either.