The majority of cat owners frequently need cat litter. Sadly, cat litter can cause clogged drains for a number of reasons. Because cat litter is designed to absorb fluids and expand, it can severely clog drains. If cat owners are thinking about cleaning or flushing their cat litter down the drain, they should be aware of this problem. What Cat Litter is made up of? The components of cat litter are important for your cat's health and well being. Clay and other minerals, natural materials like pine, wheat, or corn, or artificial crystallized silica are the main components of cat litter.