Something to become CAUTIOUS about is making use of ultrasonic Pet barking devices all around other close by dogs. The seem could possibly affect them, as well, bringing about confusion or anxiety. Working with these devices in a very managed environment in which only your Puppy is present is best. https://pawpressnews.com/best-dog-deterrent-device-for-dogs-the-ultimate-solution-for-bark-control-and-training