Feline calicivirus is one of the most common viruses within the so-called feline respiratory complex and mainly affects the respiratory tract and oral cavity. The complexity of this virus lies in the fact that it does not always present in the same way: there are different strains, some milder and others much more aggressive, which means that symptoms can vary considerably from one cat to another.
One of its most important characteristics is its high contagiousness. It spreads easily between cats through saliva, sneezing, nasal secretions or even by sharing objects such as food bowls, water fountains or blankets. Furthermore, it can survive in the environment for several days, increasing the risk even without direct contact between animals.
This is why it is particularly common in environments where multiple cats live together, such as shelters, colonies or homes with more than one feline. Young, elderly or immunocompromised cats are the most vulnerable, although any cat can become infected if exposed to the virus.
Symptoms of feline calicivirus: how to tell if your cat might have it
Nasal and eye discharge
One of the first signs is usually the appearance of mucus in the nose and eyes. It may seem like simple congestion, but when it becomes persistent or thicker, it is worth paying attention. These discharges indicate that the respiratory tract is affected and may be accompanied by constant tearing, which is uncommon in healthy cats.
Frequent sneezing
Repeated sneezing is another clear signal that something is wrong. This is not an isolated sneeze, but a continuous irritation that can intensify. In many cases, it is accompanied by more pronounced breathing sounds, as if the cat is struggling to breathe normally.
Mouth ulcers
This is one of the most characteristic symptoms of calicivirus. Small sores appear on the tongue, gums or palate that are very painful. These lesions can cause the cat to stop eating or do so with difficulty, which quickly affects its general condition.
Excessive drooling
As a consequence of the ulcers, it is common for the cat to start drooling more than usual. This drooling can be constant and is usually accompanied by discomfort when trying to eat or even when closing the mouth.
Fever and apathy
Many cats with calicivirus have a fever, which translates into more lethargic behaviour. They sleep more, move less and lose interest in playing or interacting. It is a sign that the body is fighting an infection.
Loss of appetite
The pain in the mouth, combined with general malaise, causes many cats to stop eating. This can lead to rapid weight loss if not addressed in time, which is particularly delicate in young or elderly cats.
Limping or joint pain
Some strains of the virus can cause inflammation of the joints. This manifests as temporary limping or difficulty moving, which is often surprising because it is not always associated with a respiratory infection.
Tips for quickly detecting feline calicivirus
- Sudden changes in appetite or refusal to eat
- Presence of mucus in the eyes or nose
- Excessive drooling without apparent reason
- Continuous sneezing for several days
- Lack of energy or more lethargic behaviour
- Difficulty chewing or painful meowing
How feline calicivirus spreads and how long the risk of contagion lasts
The spread of calicivirus is very easy and fast between cats. It is enough for one to be infected so that through sneezing or contact with saliva, it can transmit the virus to others. Sharing everyday objects such as food bowls, water fountains or toys is also a common route of transmission.
Furthermore, there is a key factor that is often overlooked: humans can act as indirect transmitters. We do not get sick, but we can carry the virus on our hands, clothes or shoes if we have been in contact with an infected cat or contaminated surfaces.
The risk of contagion does not disappear immediately. A cat can continue to shed the virus for weeks, even after clinical improvement. In some cases, it becomes a chronic carrier, meaning it can infect others during periods of stress or reduced immunity.
Treatment of feline calicivirus and home care
Veterinary treatment of feline calicivirus
Calicivirus has no specific treatment that eliminates the virus, so the approach focuses on alleviating symptoms. The vet may prescribe antibiotics to prevent secondary infections, anti-inflammatories for pain and treatments to facilitate breathing. The use of supplements to strengthen the immune system is also common.
Home care for feline calicivirus
At home, the owner's role is essential for recovery. It is important to keep the cat in a calm, warm and stress-free environment. Food should be soft, appetising and easy to swallow, especially if it has mouth ulcers — wet food for cats is ideal in these moments. Hydration is also fundamental, so make sure it drinks enough.
How to prevent feline calicivirus and protect other cats
Prevention is the best tool against calicivirus. Vaccination is fundamental and is part of the core vaccines that every cat should have up to date. Even if it does not prevent contagion 100%, it significantly reduces the severity of symptoms.
Furthermore, maintaining good hygiene at home is crucial. Regularly cleaning food bowls, water fountains and litter trays, as well as washing hands after handling different cats, helps reduce the risk of transmission. In homes with multiple felines, it is particularly important to act quickly if one shows symptoms.
- Vaccinate according to the veterinary schedule
- Avoid contact with unknown cats
- Maintain hygiene of objects and spaces
- Wash hands after handling cats
- Reduce stress in the cat's environment
Certain breeds with particular facial features, such as the Persian Cat or the Siamese Cat, may be more vulnerable to respiratory infections due to their anatomy.
Feline calicivirus may seem like a complex disease, but with information and attention to detail, it is perfectly manageable. Detecting symptoms in time, consulting the vet and taking good care of the cat at home makes the difference between a quick recovery and possible complications. In the end, as with so many other things, observing your cat and understanding its signals is the best tool you have. Because when you know what to look for, you can act in time… and that, for its health, changes everything.
