Bichon Frize's sleep time

Bichon Frize's sleep time is relatively long at night, but the sleep state can be divided into light sleep and deep sleep. Young Bichon Frize's sleep time is relatively small. , the sleep time of old Bichon Frize is relatively long. Generally, dogs are in light sleep. A little sound can put the Bichon Frize into sleep. There is no fixed sleep time for deep sleep. It may happen one day. I sleep 24 hours a day, and I may fall asleep at any time when I feel sleepy, so the time is not fixed.