関連ワード:  why cats like to sleep in boxes    why do cats like to lay in boxes    why do cats like to stay in boxes    why do cats like to lie in boxes    why do cats like to sleep in cardboard boxes    why do cats like to sleep in small boxes    why do cats like to lay in cardboard boxes    why do.cats like.to.lay in litter boxes    why do cats like to lay in squares    why do cats like to sleep in litter box