Our public spay neuter clinic is a low cost clinic for cat and dog owners. It operates Tuesdays through Saturdays from 8 a.m. to 4:30 p.m. by appointment only.

Here are some frequently asked questions about spaying and neutering and our Spay/Neuter program:

What is spaying and neutering?

  • Spay/neuter surgery removes the reproductive organs so cats and dogs cannot have babies. Spaying or neutering your pet will also remove the drive to mate so they will be less likely to roam, fight for territory, and develop future medical problems associated with the reproductive organs.

When should I spay or neuter?

  • Most pets can be spayed or neutered when they are between 2 and 5 months old—before they are sexually mature. Ask your veterinarian about the right age for your pet.

What are the age and size requirements at your clinic?

  • Pets must be a minimum of 2 months old and weigh at least 2 pounds to have surgery. For the safety of pets over 5 years, we suggest and may require a blood test before your pet has spay/neuter surgery. Our clinic offers pre-op bloodwork to any cat or dog on the same day of surgery for $50. Bloodwork determines your pet's health status (i.e., kidney, liver function) for a safer route of anesthesia and surgery.

Are there any other requirements?

  • If your pet is not fully vaccinated, we recommend that he/she be vaccinated at least a week prior to surgery. You can get this done at your veterinarian or make an appointment for PHS' vaccination clinic held on Wednesdays and Saturdays by emailing This is a safety precaution for pets.

What is the cost to spay/neuter my pet at the Pasadena Humane Society?

  • Cost depends on the type of animal you have and whether your pet needs vaccinations and/or a microchip.
  • Prices are for residents of our service area (Arcadia, Bradbury, Glendale, La Cañada Flintridge, Monrovia, Pasadena, San Marino, Sierra Madre and South Pasadena). All others will be charged an additional $30.00.
  • An extra charge of $50 may apply at the Doctor's discretion if a cat or dog is in heat, pregnant, overweight or the procedure requires more than the average time. Cryptorchid animals (those with descended testicles) will also incur an extra charge of $30-$100.
  • All pit bulls or pit bull mixes and Chihuahua or Chihuahua mixes up to 15 lbs are sterilized and microchipped at no cost to you if you reside in our service area. Please note your dog(s) will be assessed to determine whether or not they meet the required breed and weight specifications.
  • These are standard fees and DO NOT include charges for medication, other procedures or any complications.


Female Male
$65.00 $45.00
FeLV/ FIV testing $30



Female Male
Weight Price Weight Price
0 - 40 lbs $125 0 - 40 lbs $95.00
41 - 100 lbs $160 41 - 100 lbs $125.00
101+ lbs $185 101+ lbs $150.00

How do I make an appointment?

  • Appointments are available online or by emailing Please complete our online form or email us for fastest response. If you do not have access to email, please call (626) 792-7151 ext.138 and leave a message. Leave your name, address, phone number and a description of your pet.

Will I have to wait for an appointment?

  • The program is in high demand and available appointments fill up quickly. For information about the next available appointment email Please email us for fastest response. If you do not have access to email, please call 626.792.7151 ext.138 and leave a message.

Is the surgery dangerous or painful for my pet?

  • Spaying and neutering are the most common surgeries performed on pet animals. Healthy pets are at very little risk. Pets are given anesthesia and pain medication for surgery to minimize any discomfort.

Do I really need to fix my male cat or dog? I don’t want him to feel like less of a man.

  • Male pets do not experience a loss of identity from neutering. Neutering will not change his basic personality. He may however, be less likely to break out of your property or display aggressive behavior associated with mating.

My dog is purebred. Should I still spay her?

  • One in four dogs brought to shelters around the country are purebred. The reality is, there are too many pets, purebred and mixed breeds, and not enough homes for all of them.

Will my pet get fat or lazy if they are spayed or neutered?

  • Lack of exercise and overfeeding makes pets fat and lazy, not spaying and neutering. Spayed and neutered pets are typically healthier and can live an average longer than unsterilized pets.

What else should I know about spaying and neutering?

  • Spay/neuter surgery benefits the community. It reduces pet overpopulation and leads to fewer unwanted dogs and cats in shelters and on the street.

What are the benefits of spaying and neutering?

  • Spayed females are less likely to develop mammary tumors. Neutered males are less likely to develop testicular cancer and prostate hyperplasia. Due to the descreased testosterone after surgery, behavioral benefits may also be seen, such as decreased urine marking and aggression. Spaying and neutering animal companions also helps stop the tragedy of pet overpopulation.

There’s a wild cat on my property that I can’t touch but needs to get fixed. What should I do?

  • These wild, unsocialized cats are called “feral” and need spaying and neutering too. Click here for more information about the Trap-Neuter-Return (TNR) program.