If you’ve adopted a kitten, worked with a rescue, or spent time in cat-related groups online, you’ve probably heard of FeLV. Unfortunately, there is a lot of confusion and misinformation surrounding this disease and the testing recommendations that go along with it.
At Kitty’s Kitten Rescue, we believe in educating adopters so they can make informed decisions about their pets’ health. Let’s take a closer look at what FeLV is, how common it actually is, and why many rescues do not routinely test every kitten.
What Is FeLV?
Feline Leukemia Virus (FeLV) is a virus that affects only cats. It can suppress the immune system, increase the risk of certain cancers, and make infected cats more vulnerable to illness.
FeLV is most commonly spread through prolonged close contact between cats, including:
- Mating
- Nursing from an infected mother
- Bite wounds from infected cats
It is not spread to humans, dogs, or other animals.
How Common Is FeLV?
One of the biggest misconceptions about FeLV is that it is widespread among all cats.
Current studies estimate that only about 2-3% of cats in the United States are FeLV positive. This means that approximately 97-98% of cats do not have the virus.
While FeLV remains a serious disease, it is far less common today than it was decades ago. Improvements in veterinary care, vaccination, responsible pet ownership, and testing programs have significantly reduced the prevalence of FeLV over time.
Why Isn’t Every Cat/Kitten Tested?
Years ago, routine FeLV/FIV testing was much more common. Today, many shelters and rescues have adopted risk-based testing protocols instead.
This change is not because FeLV is unimportant. Rather, organizations must balance limited resources with the greatest overall impact on animal welfare.
Many shelters care for hundreds or even thousands of cats each year. During kitten season, resources are often stretched between food, vaccines, deworming, flea prevention, spay/neuter surgeries, emergency veterinary care, and daily care needs. Testing every healthy kitten can consume funds that may otherwise save additional lives.
Modern shelter medicine organizations recognize that testing decisions should be based on:
- Available resources
- Risk factors
- Housing situations
- Overall population health goals
Testing is strongly recommended for sick cats, high-risk cats and for cats from known FeLV-positive environments. However, routine testing of every healthy kitten is considered optional by many shelter medicine programs.
At What Age Should Kittens Be Tested?
A kitten should only be tested if she is showing signs and symptoms of illness that may be related to a compromised immune system caused by FeLV. Kitty’s Kitten Rescue recommends advising adopters to have their new kitten tested at a veterinarian rather than testing in-house prior to adoption.
Kittens under 6 months of age should not be tested, as they may test positive for FeLV even though they are rarely infected. The antibodies of this retrovirus can be passed from infected mothers through nursing and will pass through the kitten in time. Kittens should only be tested if they are above 8 months of age.
Why Doesn’t Kitty’s Kitten Rescue Routinely Test Every Kitten?
As a foster-based neonatal kitten rescue, our mission is to save as many vulnerable kittens as possible.
Most kittens entering rescue require immediate care for issues such as:
- Dehydration
- Malnutrition
- Fleas
- Worms
- Upper respiratory infections
- Eye infections
- Bottle feeding and around-the-clock neonatal support
Our limited resources are directed toward lifesaving care, vaccinations, parasite prevention, spay/neuter surgeries, and preparing kittens for adoption.
Because FeLV prevalence is relatively low in the general cat population routine testing of every healthy kitten is not always the most effective use of rescue funds.
However, we understand that some adopters may have resident cats at home or specific concerns about FeLV. For that reason, FeLV testing can be discussed and arranged at the adopter’s request.
What Should Adopters Do?
If you already have cats at home, discuss FeLV testing and vaccination with your veterinarian before introducing a new kitten.
Your veterinarian can help determine:
- Whether testing is appropriate
- Whether your current cats should be vaccinated
- How to safely introduce a new kitten into your household
Every adoption situation is unique, and your veterinarian is the best resource for individualized guidance.
The Bottom Line
FeLV is a real disease that deserves respect—but not fear.
The vast majority of cats do not have FeLV. Modern shelter medicine has shifted toward evidence-based, risk-based testing recommendations that allow rescues and shelters to focus on limited resources where they can save the most lives.
At Kitty’s Kitten Rescue, our goal is to provide lifesaving care to vulnerable kittens while being transparent with adopters about our protocols and the reasons behind them.
If you have questions about FeLV, testing, or adopting a kitten, we’re always happy to help.
Disclaimer
The information provided in this article is intended for educational purposes only and should not be considered veterinary medical advice. FeLV testing recommendations may vary based on a kitten’s age, health status, exposure history, geographic location, and the policies of individual veterinarians, shelters, and rescue organizations.
Kitty’s Kitten Rescue follows protocols based on available resources, current shelter medicine recommendations, and the specific needs of the kittens in our care. Our policies may differ from those of other rescues, shelters, or veterinary practices.
Adopters and pet owners should consult their veterinarian regarding FeLV testing, vaccination, and disease prevention recommendations that are appropriate for their individual cats and household circumstances.
While every effort is made to provide accurate and up-to-date information, veterinary guidelines and recommendations may change as new research becomes available.