I have a lovely Grand-cat named Nanuk and beautiful Grand-dog named Pika. They are David's (my oldest son) and Angie's family and are the best of friends.
They live in Kelowna, BC so I don't get to see them much. When we were there this past September, Nanuk and Pika were always getting into some kind of mischief together, especially when they were home alone.
Left to their own devices, Nanuk, with the dexterity her paws offer, would open doors and cupboards and get out paper towels or toilet paper for Pika to unravel and shred all through the house.
This was a habit of theirs. Every time we would come home, it would be to a floating sea of white tissue everywhere. ((-;
Other than that, they are very well behaved.