Not long ago, a trembling dog in a quiet bedroom was dismissed as a quirk—stress, misaligned sleep cycles, or a passing twitch. Today, it’s no longer a minor oddity. Dog owners across urban and suburban landscapes are reporting vivid, rhythmic tremors during deep sleep—twitching paws, fluttering eyelids, even faint whimpers—raising a pressing, unresolved question: what’s really happening when our canine companions sleep?

Why now?Trembling as neural echoMedical red flags or natural variation?

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