Dog & cat health · Vet-reviewed guide

Cat Upper Respiratory Infection How Long Does It Last, and Will My Cat Be OK?

Most cat colds run their course in one to two weeks. Knowing the normal timeline helps you spot the moment it stops being normal.

Quick answer: An uncomplicated cat upper respiratory infection usually lasts 7 to 14 days, and the reassuring headline is that most cats recover fully. Some signs, like the occasional sneeze or a bit of nasal discharge, can linger up to about three weeks.

Even so, you should see steady improvement over the first week or two. If your cat is eating, drinking, and gradually brightening, that is the normal course. Serious outcomes are uncommon: a URI is very rarely fatal and usually resolves on its own with supportive care. The cats that need extra attention are young kittens, senior cats, and those with weak immune systems. They can take longer to recover and are more likely to develop complications like pneumonia. So the answer to "will my cat be okay?" is that the odds are strongly in your favor, while still knowing the signs that mean it is time for the vet.

The typical timeline

For a healthy adult cat with an uncomplicated URI, expect roughly this course: signs peak in the first few days, then ease over the following one to two weeks, with full resolution usually by day 14 and sometimes stretching to around three weeks for the last lingering sneeze.¹ If a bacterial component is involved and your vet has prescribed antibiotics, you should generally see improvement within a day or two of starting them; if you do not, that is a reason to check back with your vet.

Will my cat recover? The answer

Yes, almost always. Most cats survive a URI and make a full recovery.² The searches that bring worried owners here often carry a real fear that the infection could be fatal, and it is fair to be direct: that outcome is rare and mainly affects vulnerable cats. What makes the difference is catching complications early. That part is within your control.

Which cats are more at risk

Some cats need closer watching and a lower threshold for a vet visit:

• Young kittens, whose immune systems are still developing.
• Senior cats, who recover more slowly.
• Cats with FIV, FeLV, or other illnesses that weaken immunity.

In these cats, a URI can occasionally progress to a more serious lower-airway infection, so they should be seen by a vet sooner rather than waited out.¹

A quick note on spreading it

A cat URI spreads very easily between cats, so keep an affected cat separated from other cats and don't share bowls or bedding while it recovers.² The usual viral causes do not infect people, though washing your hands after handling your cat is still sensible.

When to see a vet

Have your cat seen if it stops eating for a day, turns very lethargic, struggles to breathe, has thick green or yellow discharge, develops a sore eye, or is not improving after about a week.¹ Kittens and senior cats should be seen sooner. If a vet determines treatment is needed, the right medicine must be prescribed by a vet. See how our vet prescription service works. For more on the illness itself, see our guides on cat URI treatment and cat cold treatment.