Why do dogs spin before lying down? The surprising reason has nothing to do with comfort but ancient survival instincts

Dogs spin in circles before lying down for a reason, not by accident. Animal behavior experts say this common dog habit comes from wild ancestors that flattened grass, checked for predators, and chose safe sleeping spots before resting. The instinct survived domestication and still appears in millions of pet dogs today. The American Kennel Club says this pre-sleep routine is usually normal.

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