I have all 3 at my house. Storm and Pearl cover up their business gently and step out very slowly, Sunny and Sky are fast and furious and try to dig to China but usually end up just trying to scratch the lid of the litterbox so they sometimes don't even cover their stuff up completely, and Starr does the fast and furious when he poops and is much more dainty and gentle when he pees in the literbox. When Starr poops, he jumps out of the litterbox like a speeding bullet and runs away very fast. I guess he doesn't like the smell he makes.LOL