Cat Upper Respiratory Infections
This page is educational reference material for preparing questions. A licensed veterinarian examines the animal, makes the diagnosis, and sets the treatment.
Guide to URI in cats covering herpesvirus, calicivirus, symptoms, home care, when antibiotics are needed, and preventing spread in multi-cat homes.
Causes and Risk Factors
Multiple factors can contribute to the development of this condition.
- Genetic predisposition: Certain breeds are at higher risk due to inherited traits
- Age: Some conditions are more common in kittens or senior pets
- Environmental factors: Diet, toxin exposure, stress, and living conditions play a role
- Underlying health issues: Other conditions may increase susceptibility
- Immune system status: Compromised immune function can predispose to disease
Symptoms to Watch For
Early detection significantly improves treatment outcomes. Watch for these signs.
- Changes in appetite, water consumption, or weight
- Behavioral changes including lethargy, restlessness, or hiding
- Physical symptoms specific to the affected body system
- Changes in bathroom habits (frequency, appearance, straining)
- Visible discomfort, pain response to touch, or changes in posture
- Respiratory changes, coughing, or labored breathing
When to See the Vet Immediately
Run any significant dietary change past your vet before making it — they already know your cat's history, and existing conditions can make ordinary-seeming food swaps risky.
Diagnosis
A cat upper respiratory infection is often diagnosed from sneezing, fever, and ocular or nasal discharge. A PCR panel for herpesvirus, calicivirus, Chlamydia, Bordetella, and Mycoplasma is used when the cat is severe, chronic, or in a shelter outbreak. The cornea gets a fluorescein stain before any steroid drop, because herpes can ulcerate the eye and a steroid on an ulcer can make it worse.
Treatment Options
Uncomplicated upper respiratory disease is supportive: hydration, nutrition, cleaning the nose and eyes, and time. The veterinarian adds an antibiotic only when bacteria are part of the picture, and sets that dose. Antiviral treatment for severe herpes is a veterinary decision with no dose on this page. A cat who is not eating or is breathing with an open mouth needs a clinic the same day.
Prevention and Management
- Regular veterinary checkups (as recommended by the AVMA for all companion animals) for early detection (annually, or semi-annually for seniors)
- Maintain a healthy weight through proper nutrition and exercise
- Keep vaccinations and preventive medications current
- Breed-specific health screenings recommended by your veterinarian
- Provide a low-stress, enriched environment
- Follow your vet's recommendations for diet and lifestyle modifications
Cost of Treatment
Treatment costs vary based on severity and duration.
| Treatment Type | Estimated Cost Range |
|---|---|
| Initial Diagnosis | $200 – $800 |
| Medication (monthly) | $30 – $200 |
| Ongoing Management (annual) | $500 – $3,000 |
Common Questions
Is this condition curable?
Feline herpesvirus and calicivirus stay in the cat. A snotty flare can be nursed through, and a bacterial copathogen can be treated, but the next stress often brings the herpes flare back. Chlamydia felis and Bordetella are more likely to be cleared with the right antibiotic. AAFP respiratory guidance treats chronic sneezing after herpes as management: humidity, eye lubrication, and fewer stressors.
How can I afford treatment?
A kitten URI in a shelter cat is often an exam, subcutaneous fluids, and eye ointment. The expensive cat is the one with a corneal ulcer or pneumonia. Ask the clinic to price an eye stain and a corneal-ulcer recheck separately from a simple sneeze visit. Isolating a new cat for a couple of weeks costs less than treating every resident cat. Antiviral eye medicine, if the veterinarian chooses it, is a different line from a bottle of lysine, which has weak evidence.
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