TNR (Trap Neuter Return) is the humane and effective approach for stray and feral cats. Now in practice for decades in the US after being proven in Europe, scientific studies show that TNR improves the lives of feral cats, improves their relationships with people who live near them, and decreases the size of colonies over time. 

What Is Trap-Neuter-Return?

Trap-Neuter-Return is the only humane and effective approach to community cat populations. Here are the three basic steps to this lifesaving process:

1. Trap: Humanely trap all the cats in a colony. A colony is a group of cats living outdoors together.

2. Neuter (or spay): Take the cats in their traps to a veterinarian or clinic to be neutered, vaccinated, and eartipped (the universal symbol of a neutered and vaccinated cat. Learn more at

3. Return: After the cats recover, return them to their outdoor home where they were trapped.

Watch videos of cats being returned and how to do Trap-Neuter-Return at

To view our TNR Program Information, which includes where to rent/buy traps, where to make spay/neuter appts, and how our program works, click HERE

Colonies that are involved in TNR diminish in size over time. TNR quickly stabilizes feral cat populations by instantly ending reproduction and by removing socialized cats from the colony. 

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Additional information and resources:

Alley Cat Allies

Fix our ferals


Kitten Lady's video:

"If you see cats outside...WATCH THIS

Kitten Lady's video:

"Why are some cats FERAL?"

Kitten Lady's video:

"Trap-Neuter-Return FAQ!


Feral Cat Spaying & Neutering

Humane Society of Silicon Valley*

(408) 262-2133

$50 for spay/neuter

*Due to COVID-19 HSSV is temporarily closed to the public for Spay/Neuter Services. Please check directly with HSSV for updates. 

Nine Lives Foundation, Redwood City

(650) 368-1365

$50 (spay) $40 (neuter)

Fix Our Ferals

(510) 215-9300

$45 for TNR or free-roaming

$85 for pet cats

East Bay SPCA

(510) 639-7387

(925) 479-9674

$40 for TNR or free-roaming

$75 - $100 for pet cats

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If you are interested in becoming a TNR volunteer, please email the shelter at: