The duration of a cold in cats can vary depending on the underlying cause and severity of the symptoms. In general, a mild cold can last anywhere from a few days to a week or two. However, in some cases, a cold may persist for several weeks or longer, particularly if it is caused by a viral infection. If your cat has a cold, it is important to monitor their symptoms closely and provide them with supportive care, such as a warm and comfortable environment, plenty of fresh water, and a balanced and nutritious diet. You can also help relieve their symptoms by using a humidifier to ease congestion and wiping their eyes and nose with a damp cloth to keep them clean. If your cat's cold symptoms persist for more than a week or if they worsen, take them to the veterinarian for a thorough examination and appropriate treatment. Your veterinarian may recommend medication to help relieve symptoms or treat any underlying infections, as well as provide guidance on how to manage your cat's condition and promote their recovery.