Mack is the laziest of my 4. He will literally lay down, eat from his bowl and then go to sleep in that spot. However, I have never seen him sleep as long as your cat. Mack will play and run if something interests him. I always say he is a "short bus" cat.

Have you checked with your vet? I do know when I got my first cat after having dogs all of my life that I was amazed at how much cats do sleep.

Buddy likes to get under the covers. I have often jumped into bed to find a big lump in the middle.