As a cultural expert, I can tell you that the belief that a dog's howling is a sign of death is a superstition that has been around for centuries. It's important to note that
dogs communicate in various ways, and
howling is one of them. Dogs may howl for a number of reasons, such as to communicate with other dogs, to express boredom, to alert their owners to something, or simply because they enjoy the sound of their own voice. There is no scientific evidence to support the idea that howling is a harbinger of death.
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