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(If youve ever used a dog whistle, you know this.) Like sirens, howls contain high-pitched sounds, and scientists think that a dog howls when he hears a siren because the dog thinks he is hearing a howl from another dog.That is, the dog thinks he is communicating with another dog!oyotes, wolves and wild dogs travel in packs, raise pups in groups and have an organized social structure. Social animals communicate, and because these three groups of animals are related, it is not surprising that they all use a similar form of communication: howling, barking and growling.
The Ultrasonic Dog Chaser The ultrasonic dog repeller emits a frequency ranged from 20,000 Hz to 25,000 Hz intervally which is hardly audible by humans but can be heard by dogs or cats. The dog chaser may harmlessly deter the approach of a dog or cat when properly used.