The Dumb Friends League offers affordable spay/neuter services to all owned, pet cats and feral/community cats. We are able to offer these services thanks to the generosity of our donors.

We are not able to provide these services for-profit breeders, or rescue groups at this time. We recommend that tame, friendly cats without owners be taken to an animal shelter for adoption.


191 Yuma St. 
Denver, CO 80223 

Please note: The entrance to the Spay/Neuter Clinic is on the East side of the building.  


Pit Bull and Pit Bull Mix Breed Dogs

To celebrate the passing of the 2J legislation, which repealed Denver’s breed ban restrictions, the Dumb Friends League Spay and Neuter Clinic is offering spay or neuter surgery for pit bull and pit bull mix breed dogs.

What: Spay or neuter surgery, including rabies and distemper shots

Where: Dumb Friends League Spay/Neuter Clinic at 191 Yuma Street in Denver

When: Mondays, June 1 through November 1

Cost: $50 for spay/neuter surgery and $25 for microchipping (optional)

Our schedule for pit bull and pit bull mixed breed dogs is currently full. We may have occasional cancellations, so please feel free to check back regularly for possible available appointments.

Other Breeds

We are not able to provide these services to dog breeds other than pit bull or pit bull mixes. Please see this resource for low-cost spay neuter services for other dog breeds.



Appointments are available on Wednesdays and Thursdays.

Drop-off time for surgery is staggered between 7-8a.m. to improve social distancing.

Pick-up time is 3:30 p.m. for male cats, 4:30 p.m. for female cats.


Payment is due at the time of service; cash, check and cards are accepted.

Owned, pet cats

  • Spay/neuter surgery $25 – fee includes vaccines for rabies and distemper
  • Microchips $25
  • FeLV vaccine $25
  • FeLV/FIV test $25

Feral/community cats

*All feral cats must be brought in a humane trap

*All feral cats will receive an ear tip

  • Spay/Neuter surgery is Free – includes vaccines for rabies and distemper
  • FeLV vaccine $25
  • FeLV/FIV test $25

The League’s Spay/Neuter Clinic schedules appointments 1 month at a time. Additional appointments are made available the first day of each month. If you are unable to schedule an appointment for your cat today, please check back as appointments may be available at a later date.

Make an appointment

To register and make an appointment for an owned, pet cat click here.

For information on how to bring a feral cat in to our spay/neuter clinic, please click here.

Patient Portal

Visit the Patient Portal to book appointments and access vaccine records for pets vaccinated through the Spay/Neuter Clinic.