◈ Homepage — https://animalhospitalofwalnut.com/(909) 594-1737
22039 Valley Blvd, Suite G, Walnut, CA 91789
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Harrison, 2 years old
SERVICES
Building a better future for your pet.
Why choose
Animal Hospital
of Walnut
COMPASSION
We genuinely care about the needs of pet parents and our patients. We believe that our compassionate actions foster appreciation and tolerance, leading to a sense of safety in the workplace and an opportunity for seeing new possibilities.
KNOWLEDGE
Knowledge is power, and we will never stop learning. Our teams go through yearly continuing education to learn the latest in veterinary medicine to ensure they provide the best possible care to our patients. We also strive to educate pet parents to help empower them to make the decisions possible for their pets' health.
COMMUNITY
We are honored to serve our community and its pets as a locally owned and operated practice. We cannot do what we do without the support of our community. By forging relationships with you - we can stay connected, grow, and be a resource for our neighborhood for many years to come.
TEAM
We are a high-performing team of doctors and support staff who work skillfully together to provide the best possible care to our patients and their people. We focus on open communication, people, adapting, and always learning as a team.
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Animal Hospital of Walnut offers you and your four legged family member all of the veterinary services they need to have a long, healthy and comfortable life. Our medical, diagnostic, surgical and dental services will be delivered with the highest quality and best care possible.
Welcome
As Animal Hospital of Walnut’s medical director and owner, let me be the first to welcome you to our clinic. Here at AHoW, we strive to provide you with top-tier veterinary care and the information you need to care for your pets in all life stages and conditions of health. We understand the bond you have with your pet and are excited to partner with you in order to strengthen that connection. We look forward to meeting you and your pets!
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© 2026 Animal Hospital of Walnut.
PRIVACY POLICY
(909) 594-1737
22039 Valley Blvd, Suite G,
Walnut, CA 91789
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[email protected] Tour Animal Hospital of Walnut | Veterinary Clinic in Walnut, CA (909) 594-1737 22039 Valley Blvd, Suite G, Walnut, CA 91789 Clinic Services Patient Center Contact Us Pharmacy Book Now Team Tour the Clinic Wellness Plans Careers We welcome you to visit and tour our animal hospital to see for yourself our progressive, well-equipped, and modern facility. We strive to maintain a safe, clean, and friendly environment. Take a tour below. Team Tour the Clinic Careers Services Patient Center Contact Us Urgent Care Pharmacy & Supplies © 2026 Animal Hospital of Walnut. Privacy Policy (909) 594-1737 22039 Valley Blvd, Suite G, Walnut, CA 91789 Facebook Google Yelp Vet in Walnut | Our Vets & Staff | Animal Hospital of Walnut (909) 594-1737 22039 Valley Blvd, Suite G, Walnut, CA 91789 Clinic Services Patient Center Contact Us Pharmacy Book Now Team Tour the Clinic Wellness Plans Careers Team Christiana Otterson DVM Co-medical Director Theresa Chao DVM Co-medical Director Team Tour the Clinic Careers Services Patient Center Contact Us Urgent Care Pharmacy & Supplies © 2026 Animal Hospital of Walnut. Privacy Policy (909) 594-1737 22039 Valley Blvd, Suite G, Walnut, CA 91789 Facebook Google Yelp Book an Appointment Something went wrong. Please try again. 1 2 3 4 5 Why does your pet need to visit us? Wellness Care Annual Exam Sick Visit Injuries, Illness Other Surgeries, Dentals, Health certificates For emergencies, please promptly call our team at (909) 594-1737 . Next About Our Veterinary Hospital | Animal Hospital of Walnut (909) 594-1737 22039 Valley Blvd, Suite G, Walnut, CA 91789 Clinic Services Patient Center Contact Us Pharmacy Book Now Team Tour the Clinic Wellness Plans Careers Simply better than the rest Marble, 7 months old Team Animal Hospital of Walnut is veterinarian owned and operated by Dr. Christiana Otterson. The animal hospital has been serving the Walnut and Diamond Bar community since 1981 and has recently undergone a remodel. Our facility allows our team to work efficiently, while your pets enjoy the highest level of comfort and care. We are proud to feature an impressive array of the latest technology and equipment including digital radiology, laser therapy, and ultrasound. Our team consists of individuals coming together to create a culture that cares for each other, and for you and your pet. Team Building a better future for your pet. More Tour the Clinic Welcome! Team Tour the Clinic Careers Services Patient Center Contact Us Urgent Care Pharmacy & Supplies © 2026 Animal Hospital of Walnut. Privacy Policy (909) 594-1737 22039 Valley Blvd, Suite G, Walnut, CA 91789 Facebook Google Yelp Veterinary Clinic Services | Animal Hospital of Walnut | Walnut, CA (909) 594-1737 22039 Valley Blvd, Suite G, Walnut, CA 91789 Clinic Services Patient Center Contact Us Pharmacy Book Now Wellness Exams Nutrition Dental Care Vaccinations Parasite Prevention Microchipping Diagnostics Spay & Neuter Surgery Urgent Care They know what is good for me! Dingo, 6 years old Wellness Exams We offer a wide range of veterinary services and treatment options to help keep your pet happy and healthy. Wellness Services Book Now Wellness Exams Stay ahead of your pet’s health with regular wellness exams from your veterinarian. More Nutrition As the pillar of your pet’s long-term health, proper nutrition is key and evaluation is part of every veterinary wellness exam. More Dental Care Tartar is just the beginning. Like us, pets need regular dental exams and cleaning to keep them healthy and prevent potentially devastating issues later on. More Preventive Services Book Now Vaccinations Prevention is key! Keep your pet current on their vaccinations and prevent devastating disease or illness. More Parasite Prevention Stay ahead of the ball and save money on treatment costs when you add regular parasite prevention to your pet’s routine. More Microchipping Give your pet the best shot at making it home should they ever wander. Microchipping is a quick, easy and affordable way to do just that! More Specialty Services Book Now Diagnostics Convenient, in-house diagnostic capabilities allow our veterinarians to quickly and accurately diagnose and treat your pet. More Spay & Neuter Prevention of unwanted pregnancies, curbing unpleasant behaviors and improving long-term health...need we say more? More Surgery From routine to emergency, our talented veterinary team is committed to your pet in their time of need. More Urgent Care (909) 594-1737 Our team is here to help you and your pet during times of crisis. Check these quick signs of a pet emergency and give us a call! More Team Tour the Clinic Careers Services Patient Center Contact Us Urgent Care Pharmacy & Supplies © 2026 Animal Hospital of Walnut. Privacy Policy (909) 594-1737 22039 Valley Blvd, Suite G, Walnut, CA 91789 Facebook Google Yelp Urgent Care | Animal Hospital of Walnut | Vet in Walnut, CA (909) 594-1737 22039 Valley Blvd, Suite G, Walnut, CA 91789 Clinic Services Patient Center Contact Us Pharmacy Book Now Wellness Exams Nutrition Dental Care Vaccinations Parasite Prevention Microchipping Diagnostics Spay & Neuter Surgery Urgent Care Emergency (909) 594-1737 Animal Hospital of Walnut is pleased to offer urgent care services for your pet during our regular business hours. Below is a list of urgent care appointments we see for non-emergent health concerns. Fever Mild Dehydration Ingestion of certain toxins Ingestion of a foreign body (non food item, toy, etc) Not eating or drinking Minor wound or laceration Lameness or limping Coughing or sneezing Vomiting or diarrhea Eye discharge and squinting Abscess Back pain Ear infection Skin allergy Reaction to vaccine Anal gland problem Urinary tract issue We are also open Saturdays! In the event you have an urgent or emergent situation outside of business hours, we recommend going to the following after-hours emergency clinics listed below. MarQueen Pet Emergency & Specialty 1582 N. Benson Ave, Upland, CA 91786 (909) 303-1700 Inland Valley Veterinary Specialist and Emergency 10 W. 7th Street Upland, CA 91786 (909) 931-7871 VCA California Veterinary Specialists-Ontario 2409 S. Vineyard Ave Suite O, Ontario, CA 91761 (909) 947-3600 Contact Us Pharmacy Team Tour the Clinic Careers Services Patient Center Contact Us Urgent Care Pharmacy & Supplies © 2026 Animal Hospital of Walnut. Privacy Policy (909) 594-1737 22039 Valley Blvd, Suite G, Walnut, CA 91789 Facebook Google Yelp Contact Us | Animal Hospital of Walnut | Diamond Bar California Vet (909) 594-1737 22039 Valley Blvd, Suite G, Walnut, CA 91789 Clinic Services Patient Center Contact Us Pharmacy Book Now Urgent Care Careers I know the better way Roger, 1 years old Directions Call us at (909) 594-1737 Having an EMERGENCY? 22039 Valley Blvd, Suite G Walnut, CA 91789 MON - SAT: 8 am - 6 pm SUN: Closed
[email protected] For general inquires please send us a message Submit Team Tour the Clinic Careers Services Patient Center Contact Us Urgent Care Pharmacy & Supplies © 2026 Animal Hospital of Walnut. Privacy Policy (909) 594-1737 22039 Valley Blvd, Suite G, Walnut, CA 91789 Facebook Google Yelp Jobs in Walnut | Careers at Animal Hospital of Walnut (909) 594-1737 22039 Valley Blvd, Suite G, Walnut, CA 91789 Clinic Services Patient Center Contact Us Pharmacy Book Now Team Tour the Clinic Wellness Plans Careers Thank you for your interest in joining the Animal Hospital of Walnut in Walnut, CA! While we are always on the lookout for good team members, below are the positions we are actively seeking to fill. Animal Hospital of Walnut is currently seeking the following positions: Client Service Representative (CSR) Veterinary Assistant Registered Veterinary Technician (RVT) We welcome the opportunity to meet talented individuals who value teamwork, client service, and caring for pets. If you would like to learn more about potential career opportunities, please send your resume to the Practice Manager at
[email protected] . Team Tour the Clinic Careers Services Patient Center Contact Us Urgent Care Pharmacy & Supplies © 2026 Animal Hospital of Walnut. Privacy Policy (909) 594-1737 22039 Valley Blvd, Suite G, Walnut, CA 91789 Facebook Google Yelp New Patient Center | Animal Hospital of Walnut, Walnut, CA (909) 594-1737 22039 Valley Blvd, Suite G, Walnut, CA 91789 Clinic Services Patient Center Contact Us Pharmacy Book Now Forms Pharmacy & Supplies Patient Portal Care Credit A better life together Cashew, 4 years old Pharmacy Our patient center makes it easy for you to get everything you need in one place! From online registration forms, to ship-to-home online pharmacy, to financial assistance resources. So you can get the items you need for your pet quickly and efficiently. Forms Stay ahead of the game and complete your pet's forms online! Complete Pharmacy & Supplies Medication refills, pet food, treats, and more shipped directly to you! Order Patient Portal Make an appointment online or access your pet’s medical records here. Login Pay for Care When Your Pet Needs It Most Apply We understand that veterinary care can be unexpected—and we’re here to help make it manageable. That’s why we’re proud to accept CareCredit, a health, wellness and pet care credit card so you can you pay over time for treatment your pet needs, when they need it. With flexible financing options, you can pay over time * for services like: Emergency and urgent care Wellness exams and vaccines Surgery and dental procedures Medications, diagnostics, and more Apply in minutes online or in our office. Get peace of mind and keep your pet healthy without the financial stress. Apply * Subject to credit approval. Team Tour the Clinic Careers Services Patient Center Contact Us Urgent Care Pharmacy & Supplies © 2026 Animal Hospital of Walnut. Privacy Policy (909) 594-1737 22039 Valley Blvd, Suite G, Walnut, CA 91789 Facebook Google Yelp