December Cat Fact:

“Kittens sleep a lot because their bodies release a growth hormone only when they are asleep. Adult cats don’t release any particular key hormones during sleep. They just snooze all day because they can!! In fact cats sleep so much that by the time a cat is 9 years old it will only have been awake for 3 years of its life!”
[from: www.cats.org.uk/belfast/feature-pages/interesting-cat-facts]