Hi, I have a friend. Really I do, and no, it's not me...
She has a few barking dogs over the back fence and I suggested trying an ultrasonic device due to the telephone device not having any effect on the dog's owner whatsoever during the last 4 years.
I've found a few 'cheapies' on the net like this
Maybe the cheaper ones aren't powerful enough and some heavier artillery might be required
Anyway, the question is, has anyone here had much success with ultrasonic 'dogboxes'?