I agree with Bromley that you're possibly giving him too much exercise for his age and size. Don't worry about him sleeping too much.
I got my Ruby from a refuge as a pup, only a few weeks old.
We brought home her brother for some people who lived further from the refuge and had him for a few days. It was quite funny watching them. They would sleep, wake up, have a fight, charge around the room and fall asleep again. All in the space of about 20 minutes. She's elderly now and does sleep quite a bit, often on her back with arms and legs stretched exposing her chest and tummy. It makes me smile to her like that, so comfortable and relaxed. No room on the sofa for anyone else!
What did you you think you would have by your current age that you don't?



