The little princesses normally sleep about 99% of the day away. I usually find them in the Exact Same Position when I came home, as when I leave in the morning. With the exception of being a tad more drooly. The little sweethearts are so well-rested at that point, that they have just enough energy to try and maul each other.
This little ferocious wrestle lasts all of 2 minutes, and then they're exhausted again. It's tough being a princess pug.