Traditional clay based cat litter: This is the most common kind used and available at present. The clay minerals used are very absorbent and helps prevent cat urine odors. This clay provides odor control, but additional products can be added to control super cat urine odors. The disadvantage of clay based litter is that it needs to be replaced frequently.
Scooping / clumping cat litter: This litter consist of bentonite clay. The benefit of clumping litter is that it does not need to be changed as often as traditional clay based litter. Bentonite clay clumps together when it is moist, therefore the cat owner can easily replace only the soiled litter. The whole contents of the cat litter box also needs to be replaced on occasion but not nearly as frequently as the traditional type.
Crystal based / Silica gel cat litter: This type offers improved cat urine odor control. Crystal based cat litter has the highest moisture absorbency and when stirred regularly, it only needs to be replaced once a month. The disadvantages of crystal based type is that it is often difficult to see when it needs changing and a puddle of urine will appear at the bottom of the litter box. The crystals form lumps which can be messy when it accidentally rolls underneath furniture. Some cats even refuse to use the crystal based type because of the lumpy texture and some cat owners fear that it might be unhealthy for their cat to lick its paws after using its litter box.
Plant derived / Bio-degradable cat litter: Advantages of bio-degradable type are that is easy to flush and is environment friendly. Bio-degradablelitter cannot be harmful to your cat's health and is low in dust thus ideal for asthmatic cats. This type can be made of wheat, peanut shells, wood shavings, corn cobs and other natural products. The disadvantage of the bio-degradable type is the cost.