Yes, we don't have a yard, but Ginger is always burying treats and chew-chews in the cushions. They really do remember where all of their things are, too. Have you ever moved a "buried" treat (cleaning) and then watched Tobey go back and look for it? They can be quite determined when they know they have left something there. It's kind of cute. I always end up giving her another treat, which she promptly buries in another spot.