Spay/Neuter & Vaccination Clinic

Low-Cost Vaccination Clinic

To learn about the appointment requirements for our Low-Cost Vaccination Clinic, please visit our Vaccination Clinic Page.

Vaccination pricing can be found on our Fees and Services Page.

Trap, Neuter, Release (TNR) Services

Beginning on Wednesday, December 1, 2021, CCAS will conduct our TNR program Tuesday-Friday by appointment. There will be four appointments available each day. Patrons can bring up to two (2) cats for alteration. The TNR program is available for unowned, feral or community cats only.  Please read our TNR criteria in the list below:

TNR Criteria 

  • At this time, we are offering TNR surgeries Tuesday, Wednesday, Thursday and Friday by appointment.
  • To make an appointment, please email spay@asd.cccounty.us, call us at 925-608-8400 or come by our clinic Tues.-Fri. between 8:00 AM - 12:00 PM or 1:00 PM - 4:00 PM. If we are unable to schedule an appointment at that time, we will place you on a waiting list depending on availability.
  • Drop off is at 8:00 AM. 
  • TNR kittens must be at least 3 months old and at least 3lbs in weight.
  • Contra Costa County residents can bring up to two cats per person/address. You will need to show your ID or proof of residency, if it is not already on file. 
  • Trappers may make one appointment per week. 
  • All cats will be spayed/neutered, "ear tipped," given a microchip, vaccines (rabies and FVRCP), deworming and flea treatment, no exceptions.  
  • Trappers will be required to sign paperwork at the time of drop off verifying there is no known owner for the cat(s) they bring in for TNR services.
  • CCAS reserves the right to keep cats for any reason, such as ones that are deemed medically necessary or those that may be candidates for adoption.   
  • All cats must be in humane cat traps, one cat per trap. Cats in carriers, or multiple cats in a trap, will not be accepted. 
  • TNR pick up is on the same day, from 4:15-4:30pm.  
  • Post surgery instructions for TNR cats can be found here.

*For owned animals, please see below for information about our Public Spay/Neuter Clinic. 

Public Low-Cost Spay/Neuter Clinic

Contra Costa Animal Services (CCAS) has resumed taking appointments for our Public Spay/Neuter Clinic on a limited "by appointment" basis.  

Spay/Neuter Clinic Requirements

  • The Spay/Neuter Clinic offers low-cost surgeries to residents of Contra Costa County only. Proof of residency is required upon scheduling of appointment. 
  • All animals will be required to show proof of, or receive, a current Rabies vaccination on the date of surgery. All unlicensed Dogs will be required to purchase a County License.  
  • It is recommended that Dogs have both a Bordatella and DHPP vaccination and Cats have received a FVRCP vaccination prior to the surgery date. 
  • A nonrefundable deposit of $65 is required to be paid within five days of your pet's scheduled surgery date.  
  • Only two animals per household can be scheduled at a time. 
  • No animals under six months old or more than five years old. 
  • No brachycephalic, cryptorchid (undecended testicles) animals (cats or dogs) or Doberman Pinchers. (*See list of common brachycephalic breeds below.) 
  • Females cannot be pregnant or in heat. 
  • Females must be less than 65lbs. Males cannot be more than 90lbs.
  • Dogs must be under control, leashed or in carriers. Cats must be in secure carriers.
  • Requests for appointments must be submitted online. Once you have been approved, you will be contacted for a potential appointment.
  • Check in is by appointment at 8:30am-8:50am. Pick up will be scheduled by appointment from 3:30pm-4:00pm. If you are late to check in your appointment may be cancelled. If you are late to pick up your pet, there will be an additional charge.
  • For the safety of our staff, if your pet is too aggressive for us to handle, we will not be able to provide spay/neuter services. 

Schedule an Appointment


*We have reached our capacity for spay/neuter appointments and are unable to take further appointments at this time.

To schedule a spay or neuter appointment, please complete this online form. Please make sure you have read the Spay/Neuter Clinic Requirements above before proceeding to the form. Once you have submitted the information required on the form, a staff member will contact you to schedule an appointment.

Post Surgery Pain Medication


We can provide your pet with 3 days of post surgery pain management for $25, upon request. You must request and pay for the medication at the time you schedule your appointment. The medication will be sent home with your pet after surgery is completed. 

Animals Not Suitable for Surgery

  • Brachycephalic dog breeds (see below)
  • Cryptorchid cats or dogs (animals who have undescended testicles)
  • Doberman Pinchers
  • Females who are pregnant or in heat

Common Brachycephalic Dog Breeds

This list is not all inclusive and approval is at CCAS’s discretion.

  • American Bulldog
  • Boston Terrier 
  • Boxer
  • Brussels Griffon
  • Cavalier King Charles Spaniel
  • English Bulldog
  • French Bulldog 
  • Japanese Chin
  • Lhasa apso 
  • Mastiff 
  • Pekingese 
  • Pug 
  • Shar-Peis
  • Shih Tzu

Free Physical Exam

Pets receive a free physical examination when brought in for spaying or neutering. 

Why should I spay or neuter my animal?

Spaying and neutering:

  • Prevents needless reproduction and destruction of animals
  • Is the most effective means of preventing pregnancy
  • Eliminates or reduces the attraction of male animals to the female
  • Reduces the male’s tendency to fight and the resulting wounds and infection
  • Reduces the possibility of cancer or infection of the reproductive tract
  • Results in a generally healthier, more desirable pet
  • Allows spayed and neutered dogs and cats to be licensed at a much lower cost than non-spayed or non-neutered animals