pawalbum.comCats · Infectious diseases
Feline calicivirus
Respiratory and mouth problems can interfere with eating.
Feline calicivirus is a contagious virus that can cause respiratory illness and mouth ulcers. Similar signs occur with other infections, so appearance alone cannot establish the cause.
Track breathing, food and water intake, and contact with other cats. Contact the clinic before attending and ask about separation, cleaning, and prevention.
Editorial summary · Sources checked 29 Sep 2026. Not reviewed by a veterinarian.
Common signs
Sneezing, eye or nose discharge, mouth ulcers, drooling or reduced appetite
When to contact a vet
Difficulty breathing is an emergency. Inability to eat or drink, or a kitten becoming weak, needs prompt care.
References
For learning and care planning. Articles cannot diagnose your pet or replace veterinary advice.