Dogs howl at sirens because they have a strong sense of hearing and the sound of sirens can trigger their instinct to respond to a loud, high-pitched noise. In the wild, howling can be a way for dogs to communicate with each other over long distances. When a dog hears a siren, it may interpret it as another dog howling and join in to create a chorus of sounds. Additionally, the loud and abrupt sound of a siren can be unsettling to dogs, causing them to howl as a way to release anxiety or express discomfort.
