If you like the smell of pine, to me wood pellets work the best for odor control and adding time between cage cleaning. It is a little on the messy side when it gets wet and turns to saw dust but it's worth that bit of inconvenience. I order feline pine original (Not the clumping one, only the original formula) from Amazon (18.95 for a 40lb bag). I over pay for my pellets to have them delivered to my door. But you can also get simply pine cat litter pellets, equine horse stall pellets, or even wood stove pellets so long as they are 100% kiln dried pine. If they are for wood stoves you need to get one with no accelerant. I hear that Lowes sells them. I have to get over to Agway to get equine pine pellets cheaper, but it's almost an hour drive and I have twin toddlers so it's just easier for me to have them delivered from Amazon.