TNR: Trap | Neuter | ReturnAn outdoor cat and TNR client finds some shade!

Since 2005, Tree House has been at the forefront of identifying and implementing effective strategies for solving the issue of outdoor cat overpopulation. We currently support more than 1,000 volunteer Colony Caretakers across Chicago who help ensure that their community cats are sterilized, vaccinated, and provided with food, water, and shelter to sustain their health. Caretakers and community volunteers trap cats, bring them to Tree House for TNR surgery and updated vaccinations, and return them to their home communities.

As cute as they can be, not every cat is meant to thrive in a home environment. You can learn more about how to care for outdoor cats (and why TNR is so successful) from our colleagues at Alley Cat AlliesPAWS Chicago, and Anti-Cruelty Society.

If you need assistance implementing TNR in your home area, contact Tree House at 773-262-4000. Our staff will be happy to counsel you and suggest some options for how to manage the outdoor cats in your neighborhood. This may include Tree House coming out to perform TNR services for you, if necessary, and teaching you how to continue in the future. 

Tree House rents humane traps for a $90 fee, fully refundable upon return with the exception of a non-refundable $5 service fee. You can sign one out at the front desk for a two-week rental period. Call 773-262-4000 for more information. 

Tree House performs TNR surgeries by appointment at our Veterinary Wellness Center. Services cost $50 and include spay/neuter and vaccines. Click here to learn more!


At Tree House, we pride ourselves on empowering our community of caretakers. It takes everyone working together to create a city where every cat thrives! Click below for applications and resources to help you provide for cats in your community.

cook county feral cats ordinance

2022 Colony Caretaker Application PDF

TNR Project & Colony Management Info Sheet