Cat FIV Neutering: Reducing Transmission in Multi-Cat Households

Neutering is the most effective single welfare intervention for reducing FIV transmission in cat populations.

Key Facts

FIV is transmitted almost exclusively through deep bite wounds between cats — primarily unneutered males fighting.
Neutering males reduces roaming, fighting, and bite wound frequency by 60-80%.
FIV prevalence in neutered feral cat colonies managed by TNR programmes is lower than in unmanaged populations.
In multi-cat households, an FIV-positive cat poses minimal transmission risk to neutered companions living harmoniously.
All cats in a household containing an FIV-positive individual should be neutered to minimise risk.
Blood transfusion and bite wounds are the only practical transmission routes; casual contact, shared bowls, and grooming do not transmit FIV.

Welfare Considerations

Neutering reduces FIV transmission risk by targeting the primary transmission route — bite wounds during mating competition. This is both an individual welfare benefit (reducing injury risk for all cats) and a population welfare benefit (reducing FIV prevalence over time). Feral cat TNR programmes that include neutering of all caught individuals reduce FIV burden in managed colonies. Owner education about the role of neutering in FIV prevention is a high-value welfare communication.

What You Can Do

Neuter all cats in a household containing an FIV-positive individual to minimise transmission risk.
Support local TNR programmes that neuter and manage feral cat colonies.
Donate to low-cost neutering clinics that increase access to neutering for low-income pet owners.
Educate friends and family that multi-cat households with neutered cats pose very low FIV transmission risk.