If your cat catches a cold, their symptoms should resolve within a week or two. But keep a watchful eye on them in case their symptoms don’t improve. An unresolved cold could turn into something more serious like pneumonia. This is especially important if your cat falls into a high-risk category because they are unvaccinated, nursing, elderly, a kitten, or has a compromised immune system. In cases like these, make an appointment with your veterinarian.   And if your kitty’s condition worsens, they have difficulty breathing or stop eating, take them to the vet right away.