Cats and kittens are naturally inclined to cover their waste, so they instinctively understand the box most of the time. Happy & Polly offers some tips and tricks that'll help ensure that your litter training experience goes smoothly. Basic Cat Littering Training Supplies To litter train a cat, you're obviously going to need a cat litter box and litter. But it's important to know what you need to get. For your box, a small cheap shallow box is where you want to start with these little guys. In fact, when they're first learning you can just use the cardboard trays as their first training boxes. The cardboard trays that hold canned food are perfect for litter training kittens. They're so shallow the kitten can just walk right into it. And once they get really gross, you can just toss them in the trash. This means a clean box for the kittens, and less hassle for you. If you're working with kittens under 8 weeks old, we recommend using a kitten safe ...