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 to dogs, 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.  


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

Make an appointment

To 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.