Compassionate Carein Simi Valley, CA

ALL HEARTs Veterinary Hospital in Simi Valley, CA provides thoughtful, full-service veterinary care for dogs, cats, and a wide range of exotic pets. Our veterinarian combines behavioral awareness, advanced medical and surgical care, and clear communication to support pets and their people throughout Simi Valley and nearby communities.

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We’re All Heart — For Every Pet

A Veterinary Hospital Built on Understanding

At ALL HEARTs Veterinary Hospital, we believe excellent veterinary care starts with listening — to pets and the people who love them. Our practice was built to bridge the gap between specialty-level skill and the warmth of a family veterinarian. From behavior-focused visits to complex medical and surgical care, we take time to explain recommendations, reduce stress, and tailor care to each patient’s needs. This approach helps pets feel more comfortable and helps owners feel informed and confident every step of the way.

Behavior-Focused Care

We integrate behavioral care and low-stress handling into every visit, supporting emotional wellness alongside physical health for dogs, cats, and exotic pets.

Advanced Medical Expertise

Our team provides comprehensive diagnostics, full ultrasound, and advanced soft tissue surgery, offering a higher level of care without losing your personal, compassionate connection.

What Sets Our Care Apart

Clear Communication

We take the time to explain findings, options, and next steps so you can make confident decisions for your pet’s care.

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Exotic Experience

From birds and reptiles to small mammals, we treat over 50 species each year with species-appropriate care and handling.

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Thoughtful Appointments

Longer, unrushed visits allow us to focus on comfort, behavior, and individualized care.

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Comprehensive Veterinary Services

Our Simi Valley veterinary hospital offers a wide range of services designed to support pets through every life stage, from preventive care to advanced treatment.

Wellness Care

Routine exams, vaccinations, nutrition guidance, and preventive care plans for dogs, cats, and exotic pets to support long-term health.

Behavioral Medicine

Behavior consultations focused on anxiety, fear, and stress, integrated with medical care to improve quality of life for pets and families.

Surgery & Dentistry

Advanced soft tissue surgery, dental care with full anesthesia monitoring, and diagnostic imaging to support safe, effective treatment.

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Trusted by Pet Families

Pet owners throughout the region have followed Dr. Sweitzer across multiple practices, trusting their thorough approach, compassionate care, and ability to connect with both pets and people. Their experiences reflect our commitment to thoughtful medicine, clear communication, and genuine relationships built over time.

Jolee Echtekleff

I want to share that I have had 18 dogs my whole life. It wasn’t until this last five 1/2 years that I finally found the most compassionate , knowledgeable, caring not out for the money just to help our pet Veterinary doctor. This doctor I met His name is Dr Jason Sweitzer . I told Dr. Sweitzer I was getting a new puppy and that as soon as I brought her home, I wanted him to meet her and to examine her and let me know if she was healthy and I did and I have to say he actually saved her life ,from the very beginning when I when I received her, she had been fed raw food, frozen duck heads is what the woman sent me home with and raw chicken feet so my puppy had parasites in her tummy that Dr. Sweitzer had saved her from the beginning . My puppy Reef is five years old now and thanks to Dr. Sweitzer healthy, and thriving. I am one of those dog moms that every concern I have I call my Vet and ask him to help me to reassure me that she is gonna be OK or ask him to examine her to make sure that she’s ok ,It’s like he has X Ray fingers he can touch her and tell me what’s going on. He can look at her in the eyes and know if she’s hurting or not and he has such knowledge it’s like he studies medicine daily. I have never trusted a doctor so much. It’s such a nice feeling when you can really have a good doctor that you can trust to bring your pet to . Most dogs don’t like to go to the Vet, but it’s really weird every time she’s ever sees Dr. Sweitzer She gets excited to see him lays on her back and he gives her a belly rub. I am so grateful to have him in our lives I think it’s very important for pet owners to have a veterinary doctor that they can feel like they really do care about your animal and that you’re in good hands, knowing that you can trust them with your pet. I can’t say enough good things about Dr. Jason Sweitzer.

Patty Muskat

Pet Owner

Dr. Sweitzer is, without question, the best veterinarian I’ve had in over 40 years. His knowledge and expertise are exceptional, but what truly sets him apart is his genuine love for animals. It’s obvious the moment you walk into the office.
He takes the time to sit down on the floor and let the animals come to him, making them feel comfortable and safe before even beginning an exam. That level of patience and compassion is rare and deeply appreciated.
He is also incredibly thorough with his exams. He always looks at the whole dog, asking about eating habits, behavior, and overall well-being, and he consistently checks to see if I have any additional concerns. It never feels rushed and I always feel heard.
He takes the time to thoroughly explain all available options so you can make informed decisions about your pet’s care. On top of that, he is very responsive. Whenever I’ve called with questions, he has always been quick to respond and helpful.
I feel very fortunate to have found him and would highly recommend Dr. Sweitzer to anyone looking for a veterinarian who truly cares.

Our People, Our Purpose

Meet Our Veterinarian

Experience care built around one experienced veterinarian who takes a compassionate, thoughtful approach. Led by Dr. Jason Sweitzer, DVM, the hospital emphasizes behavior-aware handling, collaboration, and education — supporting clients, mentoring students, and helping shape the next generation of veterinary professionals.

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