This article discusses 21 ways in which cat owners might be unintentionally causing harm to their feline companions. The list covers various aspects including diet, behavior, and environmental factors. Some common mistakes include overfeeding, using dirty litter boxes, not providing enough playtime, and neglecting regular vet check-ups. These harmful actions can lead to obesity, stress, infections, and overall poor health in cats. By being aware of these potential issues and making necessary adjustments, owners can ensure the well-being and happiness of their beloved pets.