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.


  • Your cat must be 2 months old and weigh 2 lbs for spay/neuter surgery.
  • Pets less than 6 months old can eat normally the morning prior to surgery. Pets 6 months or older should not eat after midnight the night before surgery. Water is okay for all pets prior to surgery.
  • Pets 8 years and older require bloodwork prior to surgery. Please visit your regular Veterinarian to obtain bloodwork prior to scheduling. This service is also available through the Dumb Friends League Veterinary Hospital for an additional fee. You may contact the hospital at 303.722.5800 for more information.

The spay/neuter calendar is opened several weeks in advance. If you are trying to book an appointment and do not see anything available, it means that our calendar is full. Please keep checking back for availability, as cancelations happen and appointments may become available.

Owned pet cats

  • Spay surgery $60
  • Neuter surgery $30
  • Microchips $25
  • Vaccines: rabies $15, feline distemper $25

*All cats must be brought in using a secure carrier. If you do not have one, we have disposable cardboard carriers available for $5.

Feral/Working/Community Cats

  • Spay/Neuter surgery is free – includes vaccines for rabies and distemper
  • All feral cats must be brought in a humane trap
  • All feral cats will receive an ear tip

If you have a tame cat and live in one of our priority zip codes below, please visit our MetroCat team page, as fees for these clients are discounted.

80204 (Valverde/Barnum) • 80216 (Globeville/Elyria-Swansea) • 80219 (Westwood) • 80223 (Ruby Hill) • 80239 (Montbello)

Please be advised that the CSU Spur campus is still under construction. Our building is located on the north side of the campus.

Coming from the south:
From 46th Ave, turn left (north) onto National Western Dr. Continue between the Terra and Hydro Buildings. At the stop sign turn left onto Bettie Cram Dr. We are housed in the Vida Building, which will be on your right. The entrance is on the west side of the building.

Coming from the north: From 58th Avenue heading west, go past Washington St. and turn right onto Franklin St. which turns into National Western Dr. at the street light at Race Ct.; continue going straight. Continue another ¼ mile to the end of the road. We are on the northwest corner of National Western Dr. and Bettie Cram Dr.

There is limited parking on Bettie Cram Dr., with additional parking in the parking lot off National Western Dr. on the west side of the building. The entrance to the spay/neuter clinic is also located on the west side of the building. Follow the Dumb Friends League signs to the spay/neuter clinic lobby. Check-in will take place on the 2nd floor (elevator is available).