Question: are roundworms visible in cat stool?
Answer: You may find that worms, or parts of worms, are visible in your cat's stool. They may also be visible around their anus, or possibly in their bedding. Worms can be a variety of sizes; the most common worm, roundworm, can grow up to 10cm long (although you are unlikely to see one this big). Worms are usually white.