"I HIGHLY recommend this litter to any multi-kitty household. It is the BEST odor control available, and to my knowledge, the only litter containing activated charcoal on the market at this time. It is also the BEST at clumping hard, and thus not falling apart when scooped and tossed. This leads to MUCH longer periods of odor-free litterboxes between litter changes. For example, most litter has to be changed after 4-6 days of use. With daily scooping of EverFresh, I've found this timeframe extended at least by 3-5 times as long between changes. I've had kitties all of my life, and have tried just about every brand of clumping and clay litter available. Nothing comes close to EverFresh, and hope that the formula will remain unchanged and stay around for a long time. Everfresh is worth it's weight in gold!!"