Both my boys do this as well. Most mornings I wake up with all four bathroom rugs pilled by the litterbox entrance. Hobbes is the worst about digging IN the litter to China. He just digs and digs. I go in there and say Good Hobbes..Good boy Hobbie and then he gets the idea and leaves. All that rug digging and my bathroom is still like Pebble Beach most days! Sand everywhere! You'd think all that scratching on the rugs would keep wee feetsies litter free!
Claudia