It's normal for your dog to twitch during his sleep. Dogs dream just as people do, and the result is twitching, vocalizations, and noises.
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Twitching in her sleep. Normal? : r/DogAdvice
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Why Do Dogs Twitch in Their Sleep? – American Kennel Club
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Why Does My Dog Twitch When He's Sleeping? - Vetstreet
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Why Dogs Twitch in Their Sleep
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