Over 40,000 cats altered since we began
Caring for the unowned cats of Sonoma County
1 cat spayed today prevents 11,801 cats from a life of potential suffering

What we do

Spay and Neuter

With more than 45,000 cats altered to date, we are reducing the population of unowned, free-roaming cats eliminating health issues, euthanasia instances, animal abuse and neglect before they can ever occur. Learn more

Colony Management

FFSC maintains a large number of colonies throughout the county and whenever necessary will assist the public with any problems related to colony management. Learn more

Wine Country Barn Cats

Sometimes cats can’t be returned to where they were trapped.  These cats are relocated to properties where they can work, be cared for, and lead happy healthy lives. Learn more


Some cats living in feral colonies are tame and some are kittens that can be tamed down. After work in foster care, these kitties become adoptable and are searching for a new home. See our adorable, adoptable cats.


From feral to tame, from potty issues to behavior issues, we may just have the answer. Discover more

Make a difference


We can’t do what we do without a fantastic group of volunteers. If you are interested in volunteering, fill out this form and we will contact you.


All donations go to providing needed care for Sonoma County’s unowned cats. There are multiple ways to give. Learn more