True facts about ferrets:
Ferrets are half-light creatures who sleep about eighteen to twenty hours of the day, and very active for two hours twice a day. Ferrets also awaken roughly every four hours for a few minutes to eat, relieve themselves and play briefly. When they wake, ferrets shiver noticeably for periods up to twenty minutes. This is how the ferret increases his body temperature after sleep.
Awww, how cute!