Many manufacturers now provide silica gel cat litter, which is gaining popularity. Companies often claim that their silica gel is less dusty than clay litter, that it may absorb pee without the need to shovel the litter, that it can regulate odors better than clay litter, and that cats may even prefer it. Although a bag of silica gel litter will cost more than a clay litter bag of the same weight, some pet owners do not mind the cost and want to have it as one of their pet supplies because of how long the litter lasts. Some silica gel litters have color-changing indicators to assist in keeping tabs on your cat's urinary tract health.