Litter is the absolute worst part! It's so annoying, but mainly because I still have a thin plastic litterbox (like the kind of plastic used in plastic eating utensils). That's was supposed to be the beginner litterbox, but they're almost 14 weeks old now, and the cat droppings get stuck in the ridges on the bottom. Sooner or later I'll buy a real one, the one at wal-mart for 5 dollars, LOL. At keast the bottom in the inside is flat, so it's easier to scoop up the cat droppings that stick to the bottom, if you understand. It's confusing.