Purr & Simple Biodegradable Cat Litter
($14.88 for a 20-lb. bag, amazon.com)
You and your pet can both breathe easy with this eco-friendly kitty litter. Made with nutshell byproducts, this low-dust and silica-free litter is biodegradable and can go straight into your compost bin. "Dust-free litter is especially important for respiratory health," Carlson says.