Much much like the ball tower higher than, the Frisco Scratch & Roll Scratcher holds a ball inside the track, so kitties don’t really need to scurry all over the house. Senior cats will value it! Plus, cats of all ages can satisfy their scratching dreams on the cardboard Middle. https://titus22a00.alltdesign.com/the-single-best-strategy-to-use-for-sand-for-cat-litter-52554376