関連ワード:  why does cat move tail when sleeping    why do cats move tail when sleeping    why do cats move their tail when sleeping    why does my cat's tail.move when sleeping    why does my cat move his tail when sleeping    why does my cat move her tail.when sleeping    why do cats tails move when they re sleeping    why does my cat's tail move when she's sleeping    why do cats move their tail when they're sleeping    why do cats move the tip of their tail when sleeping