I've heard that news paper is way too slick & will hurt their legs. For ours, we lined the bottom with puppy pads in an overlapping manner, secured with duct tape, then covered that with pine shavings. Since they love to scratch around the pine shavings get moved, somehow they seemed to spill water a fair amount, & man, do they poop a lot! The puppy pads were easy to roll up (like a giant sushi roll) during clean up. It kept our bin clean, the baby's never hurt their legs, & cleaning took way less time. We got them in bulk from costco as well on chewy.com. If you do a bit of searching online, you can find a great price.