What is the reason why cassava cat litter has a lot of dust and is prone to sour odor during use? First, addition of stone powder. Cheap cassava cat litter often contains over 30% of cheap stone powder to reduce production costs, resulting in a sharp increase in dust. Stone powder itself has no deodorizing function, and manufacturers may use industrial essence or inferior deodorizers to mask the sour smell. In high-temperature and humid environments, the essence loses effectiveness, making the sour and foul odor more pronounced. Second, by products of deteriorated or inferior raw materials. Cassava cat litter containing stone powder has poor water absorption, and the mixture of residual urine and starch can ferment, producing rancid odors. Therefore, when selecting cassava cat litter, it is essential to focus on the following three key points: First, never choose products without a ash content test report. High-quality cassava cat litter typically has an ash content of less than 3%. Note that ash is not equal to dust. Some manufacturers equate ash and dust. Ash refers to the inorganic residue left after the cat litter is burned at high temperatures, such as stone powder or clay, which is not directly related to dust production. Dust consists of tiny particles shed during use and is primarily influenced by production processes, such as particle hardness and surface polishing. For example, a brand with 30% ash content may only have a 5% dust rate due to the addition of binding agents for surface solidification. Second, water absorption rate. A true pure starch-based cat litter should have a water absorption rate of six times or higher. Choice should be made carefully for products with a water absorption rate below six times. The durability of cassava cat litter is mainly affected by its water absorption rate. Third, avoid products with added essence. Essence not only fails to mask odors but can also harm human and pet health if of poor quality.