Understanding FIV: A Guide for Potential Adopters
If you’ve been browsing our adoptable cats, you may have seen the term FIV+ on a few profiles. While it might sound intimidating, modern veterinary medicine has shown that cats with FIV live long, happy, and remarkably normal lives.
Here is everything you need to know about welcoming an FIV+ cat into your heart and home.
What exactly is FIV?
Feline Immunodeficiency Virus (FIV) is a slow-acting virus that can weaken a cat’s immune system over many years. It is a "cat-only" virus—it cannot be spread to humans, dogs, or any other non-feline pets.
It is only spread from a positive cat to a negative cat through vicious fighting where deep, blood-drawing bites. This kind of fighting is common in unfixed outdoor male cats who are fighting for territory, NOT fixed house cats. It is also possible for FIV+ mom cats to pass the virus on to their babies. However, babies can test positive for the virus for up to 6 months while they still have mom's antibodies, and then test negative.
How does it impact the cat?
For the most part, an FIV+ cat looks and acts exactly like any other cat. They play, snuggle, and zoom around just the same!
There are three phases of the infection:
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The acute phase: The initial acute stage occurs approximately 4-6 after infection. It may manifest as, but is not limited to, a fever, swollen lymph nodes, a low white cell count or any combination of the above. Most cats survive this phase without treatment. Most cat owners do not even know this has occurred since symptoms are minimal and cats are experts at hiding illness.
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The latent phase: The cat is asymptomatic. This can last months, to multiple years (current research shows the average timespan is 7 years), or for the remainder of the cats life. Some cats never progress past the latent phase.
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The progressive phase: FIV itself does not cause any clinical signs except for an eventual (but possibly never) depletion in white blood cells and therefore the body's ability to fight pathogens.
Because their immune system is less effective, they can be more prone to:
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Dental Issues: Gingivitis or dental disease is common, so regular dental checkups are a must.
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Secondary Infections: A simple cold or a small scratch might take a little longer to heal, or might require a quick round of antibiotics from the vet.
The Bottom Line: With good nutrition, a stress-free indoor only life to reduce exposure to infectious diseases, twice-yearly vet checkups, and vaccines and preventatives kept up-to-date, an FIV+ cat can enjoy a normal lifespan.
Is it a risk to my other pets?
This is the biggest myth about FIV! FIV is not easily spread.
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To Dogs/Humans: There is zero risk. The virus is species-specific.
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To Other Cats: FIV is primarily transmitted through deep, blood-drawing bite wounds—the kind typically only seen between unneutered stray males fighting over territory. This kind of fighting is very uncommon in multi-cat households, especially when slow introductions are done.
Can FIV+ and FIV- cats live together?
Yes! Major veterinary organizations and shelters now agree that FIV+ cats can safely live with FIV-negative cats as long as the household is stable and the cats are not aggressive fighters. With proper and slow introductions, this is entirely avoidable. The virus is not spread through:
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Sharing food or water bowls
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Sharing litter boxes
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Mutual grooming
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Snuggling or playing
Why adopt an FIV+ cat?
FIV+ cats are often the "underdogs" (or undercats!) of the shelter. Because of the stigma surrounding the diagnosis, they often wait much longer for homes.
By adopting an FIV+ kitty, you aren't just getting a best friend—you’re giving a second chance to a cat that others might unfairly overlook.
If you have a peaceful home and a heart for the "misunderstood," an FIV+ cat might be your perfect match. Ask today to meet our current FIV+ rescue kitties!
