What Is FIV in Cats?
FIV stands for feline immunodeficiency virus. It is a virus that affects a cat’s immune system, making it more difficult for the body to fight certain infections and illnesses.
FIV is sometimes compared with HIV in humans because both affect the immune system. However, they are different viruses, and FIV cannot be transmitted from cats to humans.
Some cats can carry FIV for years without showing obvious signs of illness. Others may become more vulnerable to secondary infections as their immune system becomes less effective.
This is why regular veterinary check-ups are particularly important for FIV-positive cats.
Learn more about what happens during your cat’s annual check-up here.
How Is FIV Transmitted?
If you're wondering how is FIV transmitted, the main route is through deep bite wounds from an infected cat.
This means cats that roam outdoors and get into fights may have a higher risk of exposure, particularly unneutered male cats that are more likely to display territorial behaviour.
FIV is not generally spread through normal social contact such as:
- Sharing food and water bowls
- Grooming each other
- Sleeping together
- Sharing litter trays
Transmission between cats living peacefully together is considered much less likely than transmission through fighting and deep bites.
FIV can occasionally be passed from an infected mother to her kittens, although this is less common.
What Are the FIV Symptoms in Cats?
One challenge with FIV is that symptoms may not appear immediately. Some cats remain healthy for a long period after infection.
When FIV symptoms in cats do develop, they may be related to secondary infections or reduced immune function rather than the virus itself.
Possible symptoms include:
- Recurrent infections
- Weight loss
- Reduced appetite
- Fever
- Poor coat condition
- Swollen lymph nodes
- Dental or gum problems
- Diarrhoea
- Eye problems
- Slow-healing wounds
The signs of FIV in cats can also overlap with many other health conditions, so symptoms alone cannot confirm that a cat has FIV.
If you notice changes in your cat’s appetite, weight, behaviour or appearance, arranging a veterinary check is the best next step.
Regularly observing your cat at home can also help you recognise changes sooner. Read Pet-n-Sur’s guide to checking your cat ’s health at home.
How Is FIV Diagnosed?
FIV is usually diagnosed using a blood test that looks for antibodies to the virus.
Your veterinarian may recommend additional or repeat testing depending on your cat’s age, health history and initial results. For example, kittens born to FIV-positive mothers can temporarily carry maternal antibodies, which can complicate early test results.
Your vet will be able to explain what the results mean and whether further testing is appropriate.
Caring for an FIV Positive Cat
Caring for an FIV positive cat is largely about supporting their general health and identifying problems early.
Many FIV-positive cats can continue living normal, enjoyable lives.
Good ongoing care may include:
- Regular veterinary check-ups
- A complete and balanced diet
- Maintaining a healthy body weight
- Good dental care
- Parasite prevention
- Keeping vaccinations up to date where recommended by your vet
- Monitoring for changes in appetite, behaviour or weight
- Seeking veterinary advice promptly when illness develops
Keeping an FIV-positive cat indoors or in a secure outdoor enclosure may also be recommended. This can reduce their exposure to infections while preventing fights that could transmit FIV to other cats.
Preventative healthcare is particularly useful when managing a condition that affects immunity. Learn more here.
Can FIV-Positive Cats Live With Other Cats?
An FIV-positive cat does not automatically need to live alone.
Because FIV is primarily spread through deep bite wounds, cats that live peacefully together without fighting may have a relatively low risk of transmission.
However, every household is different. Your vet can provide advice based on the cats’ health, personalities and living arrangements.
If introducing cats, take the process slowly and provide enough food bowls, litter trays, resting areas and other resources to reduce competition and conflict.
Preventing FIV
Reducing fighting is one of the most practical ways to lower the risk of FIV transmission.
Owners can consider:
- Keeping cats indoors, particularly at night
- Providing secure outdoor enclosures
- Desexing cats to help reduce roaming and territorial fighting
- Introducing new cats gradually
- Discussing FIV testing with a veterinarian when adopting a new cat
Vaccination is another topic worth discussing with your vet, as recommendations can depend on your cat’s individual circumstances and lifestyle.
For more general information about cat vaccinations, click here.
FIV and Other Health Conditions
Having FIV does not mean every future illness is caused by the virus.
Cats can still experience many of the same conditions as other cats, including respiratory infections, asthma and diabetes.
Understanding the difference between symptoms and seeking veterinary advice rather than assuming they are related to FIV is important.
For further information on common feline conditions, you can explore:
Planning Ahead for Your Cat’s Healthcare
FIV is a good example of why proactive healthcare can be valuable throughout a cat’s life. Regular check-ups and early attention to changes can help identify health concerns before they become more difficult to manage.
Unexpected veterinary costs can also arise with any cat, regardless of whether they have an ongoing health condition. Planning ahead financially can make it easier to focus on appropriate care when something unexpected happens.
If you're considering insurance, arranging cover while a cat is young and healthy can be worth exploring, as existing health conditions may affect future eligibility or cover.
Read more about insuring your cat from a young age here.
You can also learn more about Pet-n-Sur cat insurance here.
Supporting an FIV-Positive Cat
FIV in cats is a lifelong condition, but a positive diagnosis does not define a cat or automatically mean poor quality of life.
With regular veterinary monitoring, good nutrition, a safe environment and plenty of everyday care, many FIV-positive cats can continue enjoying comfortable and fulfilling lives.
The most useful thing owners can do is stay informed, watch for changes and work closely with their veterinarian. At Pet-n-Sur, we believe practical knowledge and proactive care can help owners feel better prepared to support their cats through every stage of life.
