Cecil and Brandy do that when they have to go, but are trying to hold back. Sometimes when they get up from a nap or first thing in the morning, they will sit/scoot. I take them out and they immediately poop. Sometimes they have done it on the grass immediately after pooping like using toilet paper. They get checked regularly for worms and behind stuff and it's just what the girls do when they need to go, but just really don't want to have to do it right then.