(951) 688-4340
6165 Industrial Ave, Riverside
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We offer low-cost spay and neuter services at the Mary S. Roberts Pet Adoption Center in Riverside, CA.  Appointments are necessary and can only be made online. We do not schedule appointments over the phone. 


The current demand for low-cost spay/neuter services far exceeds what Mary S. Roberts Pet Adoption Center can provide. We understand your frustration, and your patience while we do our best to provide as many openings as possible for quality spay/neuter services.

 Public spay/neuter is only performed on Tuesday, Wednesday, and Thursday. 


Lost your pet(s) vaccine records or spay/neuter certificate? We are happy to provide you with duplicates.  Use the link below to request them.


Spay/Neuter Pricing*

(Includes a 24-hour pain injection.  Additional pain medication can be purchased for an additional charge: pricing is subject to change without notice)


  • Cat/Kitten $80
  • Community Cat/Kitten $55  MUST be in a humane trap that is covered and labeled with cat name/trapper name to receive surgery - no carriers, boxes or crates will be accepted

No community cat surgeries on August 2nd, 6th or 8th due to staffing shortages.  We appreciate your understanding. 

    • All community cats will be ear-tipped. 
    • Surgeries are limited to two community cats per person. 
    • We will only accept 10 community cats per day.
    • All friendly cats will be charged $80 alter fee. 
    • Traps are available for rental for $5/per day or $20/per week with a $75 deposit refunded when the trap is returned. 
    • No appointment is needed.
    • Drop are accepted Tuesday - Friday from 7am -9am (no community cat surgeries are performed on Mondays) 
    • MSRPAC has dedicated the fourth Tuesday of each month for community cat surgeries (limit of 40 per day- first come, first serve). 
      • April 23
      • May 28
      • June 25
      • July 23
      • August 27
      • September 24
      • October 22
      • November 26
      • December - no surgery - Christmas Eve
    • To save time at check-in, please download and fill out the Community Cat Admission Form

 Download Rental Agreement Form

  • Dog Spay/Neuter (0-29.9lbs) $135
  • Dog Spay/Neuter (30-44.9lbs) $155
  • Dog Spay/Neuter (45-59.9lbs) $175
  • Dog Spay/Neuter (60-74.9lbs) $195
  • Dog Spay/Neuter (75-89.9lbs) $220
  • Dog Spay/Neuter 90 and above $235 plus $1 per lb over

Additional Services & Charges (available while your pet is under anesthesia). 

Prices are evaluated and quoted at the time of the exam.

  • Cryptorchid & Hernia Repair 
  • Complicated Surgery (obese or advanced pregnancy*) 
  • Baby Tooth Extraction 
  • Dewclaw Removal (nonbone attachment) 
  • Microchip  $28 (includes registration)
  • Nail Trim - All Paws $10 (performed during surgery)
  • Nail Trim - All Paws $18
  • Dog Flea & Tick Treatment $18
  • Cat Flea Treatment  $18
  • Ear Cleaning $18
  • Anal Glands $18
*Advanced pregnancy is defined as a dog/cat gestational period of 3 weeks or more.


  • Rabies (required) $15
  • DA2PPV (canine) $24
  • FVRCP (feline) $24
  • Bordetella (kennel cough) $24
  • Feline FeLV Vaccine $22
  • Feline FeLV/FIV Test $44

Pets not undergoing surgery can receive vaccines, and other services Monday - Friday from 10:00 am - 2:00 pm ($5 office visit fee, per animal applies)  You may walk in or schedule an appointment. 

Walk-ins will incur a $10 per animal walk-in fee and will be seen after our appointment based clients.


Do I need to make an appointment to have my pet spayed or neutered?

Yes! Surgery is performed Tuesday – Thursday


California state law requires current rabies vaccination for your dog.  Please bring proof in the form of a rabies certificate.  We are otherwise required to give your dog a rabies vaccination at the time of surgery for a charge of $15.  

Surgical admission for ferals begins at 6:30am, dogs 6:45am and cats 7:15am.

Surgical rechecks:  Monday - Friday from 10:00 am - 2:00 pm (except for major holidays)

Is the Spay/Neuter Clinic a full-service veterinary hospital?

No.  For complete care of your pet, please visit your local veterinarian.

Financial Assistance Resources


Location & Hours

Spay/Neuter Clinic
6165 Industrial Avenue (next to the Pet Adoption Center main building - enter at the first driveway with the clinic entrance banner)
Riverside, CA

Hours of Operation
Monday thru Friday
7:00am to 5:30pm