Some ultrasonic devices come with LED flashlights to guard you from Doggy attacks even in the dead of night. They are safest to carry during the night time, particularly when you suspect the existence of aggressive dogs. “Unexpected rapid movements (like managing) could be perceived as aggression by a Canine https://pawpressnews.com/best-dog-deterrent-device-for-dogs-the-ultimate-solution-for-bark-control-and-training