Animal Medical Center

At Merced Animal Medical Center we are committed to providing comprehensive care utilizing the latest technologies and protocols in every area. Whether you are a new pet parent or have been for many years, we are here to form a lasting bond with you and your pet, supporting you with all the necessary tools and advice for daily life, and diagnosing and treating your pet when ill. Founded in 1986, we have evolved from a regular daytime practice to a full service facility. 

Due to the overwhelming need for an after hour critical care facility in the area, we added 24 hour emergency services in 2007. We offer urgent care exams at a reduced cost 7 days a week from 8am-10pm, making it more convenient and affordable for the people and pets of Merced, Mariposa, Atwater, Los Banos, Chowchilla, Madera, Yosemite, Le Grand, Planada and the surrounding communities. 

Animal Medical Center is a full service veterinary hospital that provides general practice including routine preventative medical care for healthy pets, in addition to critical care for sick or injured pets in the Merced, California area. Our highly trained veterinarians and technicians can handle any pet emergency, from a small laceration to major trauma. Your pet will receive all required treatments, monitoring 24 hours a day and pain management.

It is our mission to provide the highest quality medical and surgical care to our patients, and to offer the best possible services for our clients.

Services Offered include:

  • General Medicine for Dogs and Cats
  • Digital Radiology 
  • Dental Radiology
  • EKG 
  • Full Service Laboratory
  • Board Certified Soft Tissue and Orthopedic Surgeon
  • Board Certified Cardiologist
  • Tonometry (for measuring eye pressure)
  • Emergency Medicine 24/7
  • In-House Pharmacy
  • Online Pharmacy
  • Canidae Premium Dog and Cat Food
  • Hill's Prescription Diets for Dogs and Cats

  • 3765 E. Yosemite Avenue
  • Merced,CA 95340
  • Phone: (209) 383-0434
  • Fax: (209) 383-4201
  • ER: (209)381-0911
  • Email Us
  • Get Directions
  • Open 24 Hours a Day
  • 7 Days a Week
  • Routine Appointments Everyday From 9am-8pm
  • After hours emergency? 24/7 Call (209)381-0911
  • Michelle Sheffield, DVM

    Managing Veterinarian

    Dr. Michelle Sheffield grew up in San Diego, practiced in Cinncinati, OH for 3 years and returned to California to join Animal Medical Center in May 2005.
  • Mark Gallardo, DVM


    Dr Gallardo is originally from Utah, but attended UC San Diego. He majored in animal physiology and neuroscience and performed neurophysiology research at the UCSD medical school on Parkinson's Disease. He then attended veterinary school at Cornell University in New York from 1997-2001, followed by a post doctoral internship at Texas A&M University. Since then, he has split his time between practicing veterinary medicine in Oregon and California, with a special interest in urgent care, emergency medicine and complementary medicine. One of his greatest passions and achievements has been starting non-profit fundraising and awareness programs for small business women in Myanmar (Burma) and the refugees from Syria living in Lebanon.
  • Sergio Iniguez, DVM

  • Erin Paster, DVM Diplomate ACVS

    Dr. Paster received her veterinary medical degree from the University of Minnesota in 2001. She then finished a rotating internship at Michigan Veterinary Specialists in 2003.

    Dr. Paster worked at the University of Pennsylvania for 1 1/2 years as a post-doc, where she was involved with canine hip dysplasia research, including the Nestle-Purina life-long study in Laborador Retrievers. She was PennHIP certified in 2003. She also ran the PennHIP clinic at the University of Pennsylvania, educating clients, veterinarians, and dog breeders about PennHIP screening and hip dysplasia. Dr. Paster completed a 3 year surgical residency at UC Davis and became a Diplomate of the American College of Veterinary Surgeons (board-certified surgeon) in 2009.

    She is now a mobile surgeon working through Mobile Surgery Services. She provides surgical services to Animal Medical Center offering orthopedic, soft tissue and neurosurgical procedures and PennHIP evaluations.

  • Brian MacKie, DVM, DACVIM

    Dr Brian MacKie received his Doctor of Veterinary Medicine degree from Washington State University in 2005. Following graduation, he completed a one-year rotating internship in small animal medicine and surgery at VCA Sacramento Animal Medical Group in Sacramento, CA. After his internship, he moved to the University of Wisconsin- Madison to complete his residency training in Cardiology from 2006-2009.
    His clinical interests include, but are not limited to, clinical cardiology such as echocardiography and electrocardiography (ECG), pulmonary hypertension in dogs, syncope (fainting) associated with heart disease and arrhythmias, congenital heart disease, arrhythmias, and congestive heart failure (CHF). His goal in therapy is to maintain an exceptional quality of life for his patients with heart disease.
    Dr MacKie is available by appointment at Animal Medical Center once monthly. Please call our office at (209)383-0434 to schedule an appointment.
  • Toussaint D., RVT

    Registered Veterinary Technician, Day Supervisor

    Toussaint joined AMC in 2008. In 2005, he graduated from the Bel-rea Institute in Denver, Colorado with an Associate of Applied Science Degree in Veterinary Technology. Toussaint lives on 10 acres with his wife, daughter, 2 mastiffs, 2 cats, cows and goats. He loves having the pleasure to work with pets and his priority is providing quality nursing care.
  • Shannon L

    Veterinary Assistant

    Shannon has been part of the AMC staff since 2008. She initially worked at our reception desk, but has shown extreme growth by learning first the pharmacy assistant position, and now spends her time as a technician assistant. Her wide range of knowledge within the hospital is impressive, but Shannon has found a particular love for emergency medicine and the unexpected challenges it brings with each day (and night!).
  • Ashlee G.

    Veterinary Assistant

    A native of Cathey's Valley, Ashlee joined the reception team in September 2011. She is currently enrolled in college to receive an Animal Science degree. She hopes to transfer to UC Davis after receiving that degree. Her goal is to become a veterinarian and open her own clinic one day. Currently, Ashlee has a horse named Smokey and two dogs named Moose and Bear.
  • Lynea S

    Reception Supervisor

    Lynea started working in veterinary care in 2006 as a receptionist for emergency services. In 2009 she joined the AMC family. She originally became interested in the field after her cat passed away, creating a desire to be there for others the way that others were there for her. She plans to continue being a receptionist and helping people and animals with our team indefinitely. Some of her favorite things are a hot cup of coffee to start the morning, and cuddling with new puppies that come in. When she goes home she enjoys spending time with family and friends, playing rummy, and a full house with 1 cat, 2 pit bulls, 1 poodle and a 3 month old puppy.
  • Beth N.


    Beth has been with Animal Medical Center since 2005. Her experience and knowledge of the hospital help the reception area run smoothly. Beth loves getting to know clients and patients, and especially enjoys watching the puppies and kittens grow through the years. When Beth isn't on the job, she keeps busy with her family, which includes 3 dogs and a cat.
  • Cailyn Y


    Cailyn started working in the veterinary field in 2013, but working with animal and the desire to continue in a lifelong career started started when she was a small child. She has varied experiences with large and small animals, ranging from horses, cows, goats, cats and dogs. She currently works three animal care related jobs, is getting her Bachelor's in Animal Science, and participates competitively with her mare. In her free time (what free time?) she enjoys spending time with her dogs, horse and family.
  • Ngoc T


    Ngoc started her pursuit of a career in Veterinary Medicine in 2009 when she took an animal science class at Merced College. A recent graduate from Fresno State University in December 2015 with a B.S. in Animal Science (Pre-Vet). she plans on continuing to a Veterinary College to become a Veterinarian. Currently, she has entrusted AMC to give her hands-on/on the job experience to use later on in her career. She views each and every pet as a special gift and that they deserve all the care and attention we can give them. She enjoys coming to work each and every day and getting free pet therapy from all the furry friends we get to give love to and receive love from.
  • Debby L

    Office Call Assistant

    Debby, a long time Merced resident, has been involved with veterinary medicine for a number of years including working at AMC since Dr. Hill bought the practice in 2004. Debby is the proud owner of three rescue dogs and a horse.
    One of her responsibilities, is working with laboratory manufacturing representatives to ensure the  necessary accuracy and reliability for the various laboratory machines that are being utilized by the Hospital.  Additionally, she provides policy and procedure training for new Hospital personnel.
    Debby is a consummate professional in dealing with the clients and  the needs of their pets.
  • Nicole T

    Office Call Assistant
    Nicole is another new member of our staff. She has shown outstanding knowledge in animal health care and customer service. Nicole went to school to become a veterinary technician and has done a lot of hands on experience since then. She is currently attending school again in order to take her RVT certification test and to obtain her A.S. degree in animal science. Nicole helps as a Office Call Assistant, restraining patients and educating the public on patient management and health. She herself has dealt with her pets in distress when her cat became ill, so she feels its important to be a liaison between animal and owner. In her off time, Nicole enjoys spending time with her daughter and adopted “Fur babies”.
  • Marlyn O

  • Perla P

  • Ivonne R

  • Isabelle A

  • Deanna A

  • Daisy R

  • Sophie S

  • Janet J, RVT