Unusual Stool: One of the most common signs of worms in cats is unusual stool. If you notice your cat's stool is looser than normal, or if there is an unusually large amount of it, then your cat may have worms. Additionally, you may notice bits of rice-like worms in the stool, which is a sure sign of a worm infestation. 2. Weight Loss: Worms can cause your cat to become malnourished, leading to weight loss even if you're feeding them regularly. If your cat is losing weight and you don't know why, then it may be due to a worm infestation. 3. Vomiting: Vomiting is another common symptom of worms in cats. If your cat is vomiting regularly, then it may be due to a worm infestation. 4. Scooting: If your cat is scooting on their bottom, then it could be a sign of worms. This is because worms can cause irritation and itching in your cat's rear, prompting them to scoot in order to relieve the irritation. 5. Dull Coat: Worms can cause your cat to become malnourished, which can lead to a dull-looking coat. If your cat's coat is looking dull and you don't know why, then it could be due to a worm infestation.