Are any types of cat litter poisonous to cats?
Most kitty litter products are made out of organic materials such as bentonite clay or silica. These substances are considered to be chemically and biologically inert, and do not pose a toxic concern for pets. Cats may ingest small amounts of litter when grooming themselves after using the litter box, and these amounts pass through the digestive tract easily without problems. However, if an animal ingests a very large amount of litter (as can happen when a dog “cleans out” the litter box), gastrointestinal upset, constipation, or in rare cases, intestinal obstruction could potentially occur.
