I never notice her doing it in the day that much but it always seems when I'm trying to sleep Hootie will use the bathroom then spend several minutes scratching and digging to cover it up. Even if the box is freshly cleaned she will do this and Sissy rarely does it, only scratching a few times before leaving. Sometimes I think Hootie is doing it on purpose because as I've mentioned I only really notice it when I'm trying to sleep.