TL;DR: Watery eyes and a runny nose in cats are typically signs of a mild respiratory infection or allergies and are rarely emergencies. You should seek veterinary care if the discharge becomes discolored or if your cat stops eating.
What causes my cat to have watery eyes and a runny nose?
When a cat experiences watery eyes and a runny nose, it is most frequently a sign of an Upper Respiratory Infection (URI), which is similar to a human cold. These symptoms are often caused by common feline viruses, such as Feline Herpesvirus or Calicivirus, or occasionally by bacterial infections. In some instances, clear discharge can also be a reaction to environmental allergens like dust, pollen, or strong fragrances.
Is it an emergency if my cat has a runny nose and watery eyes?
- The urgency level for simple watery eyes and a clear nasal discharge is generally Low, and most cats recover with rest.
- Monitor your cat closely for changes; if they stop eating or appear very lethargic, contact your veterinarian.
- Schedule a non-emergency visit if the discharge becomes thick and discolored (yellow or green).
How can a photo help my veterinarian triage my cat's symptoms?
- Capturing a clear, close-up photo allows a professional to assess the color and consistency of the discharge.
- Visuals allow for the detection of secondary signs, such as swelling of the third eyelid or crusting around the nostrils.
- Providing this visual information helps determine if the issue is viral, bacterial, or allergic, ensuring your cat receives the most appropriate advice quickly.
Clinical Context (Merck Veterinary Manual)
In cats, watery eyes and runny nose are commonly associated with feline viral rhinotracheitis (FVR; feline herpesvirus type 1), feline calicivirus (FCV), *Chlamydia felis*, *Mycoplasma felis*, or combinations of these infections. While feline pneumonitis (*Chlamydia psittaci*) and mycoplasmal infections are of lesser importance, feline infectious peritonitis may present with mild upper respiratory signs. Chronic rhinitis is frequently complicated by secondary bacterial colonization or infection, and environmental aeroallergens may play a role. Other causes of acute rhinitis include smoke aspiration, inhalation of irritant gases and dusts, or nasal foreign bodies.
Chapter: Infectious Disease, Ophthalmology, Respiratory
Source: The Merck Veterinary Manual, 11th Edition (Page 1482)