SATURDAY: 8:00AM - 8:00PM
SUNDAY: 9:00AM - 8:00PM



Dr. Robert Santos, DVM


Dr. Robert Santos was born in Turlock and raised on a dairy farm. His deep love of animals led him to Wheaton College for his undergraduate work and then on to Purdue's School of Veterinary Medicine (1991). His lovely wife Kristen has received a doctorate in education. They have two sons, Nickolaus and Teddy and a daughter Phoebe. They all live on their thirty acre ranch called, Einstein Acres that is completely run on solar power.

Since 1991 Dr. Santos has been a part-time instructor as MJC, teaching Animal Health and Animal Behavior. His community activities include serving on the Turlock Historical Society (1993) and the Chatom School Board (1995). He is the Past President of Turlock Downtown Association and was President for NSJVMA (Norther San Joaquin Veterinary Medical Association).

He is now the Co-Chair for the Turlock Centennial Committee, and has recently been elected as part of the Turlock Irrigation District (TID) Board. He also is involved in Carnegie Arts Foundation, Turlock Rotary Noon Club, Turlock Masonic Lodge III 395, and Turlock Exchange Club. He created Vet Club for the local children with interests in animals and also does numerous speaking engagements throughout the year for clubs, 4-H groups, schools and various educational groups. 



Dr. Doug Marks, DVM


Dr. Doug Marks was born in Omaha NE "many years ago." He grew up in Omaha, Bismark, ND, Decatur, IL, Albany, NY area and Birmingham, AL. He went to three different high schools in three different states (IL, NY & AL). After graduating from Auburn University School of Veterinary Medicine (Alabama), he and his wife moved to Turlock.

His family now lives in the country near Hughson He and his wife, Cathy, have been married since 1971. They have three boys, Ryan, Nathan, and Tyler. The Marks have four cats and two dogs.

Dr. Marks and his wife enjoy outdoor activities like camping, backpacking, fishing and 4-wheeling in the mountains in their Jeep. He is an adult leader for the junior high youth group at Monte Vista Chapel and a Scoutmaster for the Boy Scout Troop 451 in Turlock. He heads the Veterinary Explorers Program here at Monte Vista. Dr. Marks had training for Trail Vet in 2007 and will be spending three weeks in Alaska this March as Trail Veterinarian. He is a member of the Turlock Noon Rotary Club, staff veterinarian for Stanislaus Wildlife Care Center, and is a member of many local and national veterinary associations.



Dr. Mary Avalle, DVM


Dr. Mary Avalle was born and raised in Dayton, Ohio. She left for what was going to be only 4 years when she went to college at the University of Georgia and hasn't made it back yet.

After obtaining a Bachelor of Science in Agriculture degree she went on active duty in the U.S. Army. She was assigned to a base in California and realized this was where she wanted to settle down. Through her association with the armed forces she has lived in and been to exciting places like Honduras, Italy and Louisiana.

After graduate school in Michigan where she obtained a Master of Science degree and after working in research for a few years, she finally got down to the business of veterinary medicine and graduated from the University of Missouri in 2005 with a Doctorate of Veterinary Medicine. Dr. Avalle made it back to California and worked primarily with dairy cows for a few years before making the transition to small animal medicine.

 Her special veterinary interests include nutrition and geriatric medicine and enjoys exercising and gardening in her spare time. She is happily settled in Turlock with her menagerie of dogs and cats and hopefully chickens soon!



Dr. Brandon Barrett, DVM


Dr. Barrett received his bachelors in Biology from Cal Poly, San Luis Obispo in 1997. He then received his doctorate of Veterinary Medicine from UC Davis in 2001 and has been working at Community Veterinary Clinic ever since.

He treats both small animals (dogs and cats) and exotic species (birds, reptiles, amphibians, rodents, rabbits, etc.)

Dr. Barrett and his wife Tonia, a local photographer, are both from Turlock. They share their house with their son Grayson, their dog, two cats, two chinchillas, two birds, a bearded dragon, and several fish.

Dr. Barrett is involved with teaching Vet Club for local children along with Dr. Santos and is an instructor at MJC teaching, Surgical and Dental Procedures.

You can also visit Dr. Barrett at:



Dr. Lee, DVM


Dr. Lee was born and raised in Stockton, California. She earned her Bachelor's degree in Biology from UCLA and then graduated from UC Davis School of Veterinary Medicine. She has been working at Monte Vista Small Animal Hospital ever since. 

During vet school, she spent time doing cancer research, volunteering at spay and neuter clinics, and traveled to Honduras to provide veterinary care to under-served areas. Dr. Lee has a passion for surgery, and although she works primarily with dogs and cats, she also has enjoys working with small mammals like rabbits, guinea pigs, and chinchillas. 

Dr. Lee also has an interest in minimally invasive diagnostic tools and has undergone an intensive hands-on training course in the use of the endoscope. She loves her job and is always working to improve her skills to help her patients live longer, happier lives. 

When not working,  you can find her doing yoga, running, biking, and gardening. One of her favorite past times is spending time with her Jack Russell terrier '' Wally''.

She enjoys meeting the pets and families of Monte Vista,  and she looks forward to meeting you and your pets soon.




Dr. Renae Estrada, DVM


Dr. Renae Estrada was born and raised in Denair. She attended Denair Elementary and Denair High School. After high school Dr. Estrada attended Modesto Junior College and Merced College while working for Dr. Robert Santos at Community Veterinary Clinic.  She transferred to UC Davis to finish her bachelor’s degree in Biology.  Dr. Estrada received her Doctorate of Veterinary Medicine from UC Davis in June 2008.  She is currently working at Monte Vista Small Animal Hospital in Turlock. 

Dr. Estrada is a member of the American Veterinary Medical Association (AVMA), California Veterinary Medical Association (CVMA), and Northern San Joaquin Veterinary Medical Association (NSJVMA).  She takes special interest in ultrasound, orthopedic surgery, soft tissue surgery, and ophthalmology.

Dr. Estrada lives in Turlock with her husband, Sammy, and their 2 daughters, Coraline and Avery. They also have 2 dogs and 2 cats (Bill, Ralph, Moe, and Jerry).  She enjoys exercising, camping, kayaking, and travel of any kind.  Renae stays involved in the community by participating in Vet Club and visiting local schools to discuss veterinary topics. 



Dr. Janna Perez, DVM


Dr. Janna Perez is a native of the San Francisco Peninsula. In 2007, she graduated from Cal Poly, San Luis Obispo with a Bachelor degree in Animal Science. Shortly after, Dr. Perez worked in biomedical research working with transgenic chickens. As a Navy spouse, she relocated to New Jersey and began working as a veterinary technician. In 2009, Dr. Perez returned to California to pursue her dream to become a veterinarian at Western University of Health Sciences. She graduated with honors and a member of Phi Zeta Veterinary Honor Society.

Prior to joining Monte Vista’s team, Dr. Perez was a solo small animal practitioner in Sacramento. Her interests include internal medicine, soft tissue surgery, dermatology and emergency medicine. She has completed a certification in advanced diagnostic ultrasound with over 140 hours of formal training performing abdominal and cardiac ultrasounds. She strives for lifelong learning to provide the best care to her patients.

She is a member of the American Veterinary Medical Association (AVMA), California Veterinary Medical Association (CVMA), American Animal Hospital Association (AAHA), and Veterinary Emergency and Critical Care Society (VEECS).

Aside from practicing medicine, she enjoys relaxing by watching a good movie, gardening or spending time with family and friends. Dr. Perez has been married for over a decade to her husband Jason and shares her home with 3 chihuahuas and 3 cats: Jazmin, Nalah, Gabby, Bianca, Luna and Raisin.


Dr. Wu, DVM


Dr. Wu was born in Taiwan and moved to the US when she was in third grade. She spent most of her childhood in Massachusetts and later Los Angeles. She got her undergraduate degree in biology and animal science at Cornell University. As a fun fact, she also spent a semester abroad in Florence learning culinary arts. Right after undergrad Dr. Wu went to vet school at UC Davis. There she worked with various non-profit organizations for pets of the homeless and feral cats.

Dr. Wu has a Labrador named Rose and a Bengal cross named Loki. On her free time she likes to take Rose on hikes and play fetch with Loki- yes, the cat plays fetch. She also enjoys cooking, reading and swing dancing. Dr. Wu is new to Turlock so she’s really looking forward to getting to know the town, the people, and the pets!



Dr. Chelsea Davis, DVM


I was born and raised in Turlock and attended turlock high school (go dogs!). I received my undergraduate degree in Animal Science at Fresno State. Right after undergrad, I began veterinary school at Ross University on the island of St. Kitts in the Caribbean and finished my last year of veterinary school at Purdue University. While in vet school, I traveled to Guatemala to provide free veterinary care and surgeries to those animals in need.

I have 2 corgis, William and Kate, and 3 cats, Lena, Nala and Monroe, a three legged kitten. In my spare time, I enjoy watching soccer games, going to the beach and participating in dog agility competitions with my dog Kate. While on St. Kitts I became scuba certified and enjoyed scuba diving during my time on the island. I am glad to be back in Turlock and look forward to meeting and treating your pets.




Nancy Santos

Finance Manager

As Finance Manager, Nancy oversees all financial, bookkeeping, and payroll duties at MVSAH. She is also an assistant to the Hospital Director.

Nancy has 35 years of experience in bookkeeping and business managing. She worked for the family dairy for 16 years and has been working for Dr. Santos for the last 19 years. Her love for animals is a job bonus.

Nancy lives on her 22-acre farm with her 3 dogs - Fred (only 3 legs), Hot Wheels, and Little Guy - and her 3 cats – Six Toes, Lilly, and Poppy.

P.S. She was also the one who caused Dr. Santos to run away at the age of 6. His venture was short-lived; he had forgotten to say good-bye to his pet parakeet.

To contact Nancy, email or call 209-634-0023. 



Sara Leimgruber

Hospital Director

Sara Leimgruber is the Hospital Director at Monte Vista Small Animal Hospital, and she has worked here for 4 years. She and her husband Andrew live in Turlock, and their family consists of Remington, a Border collie, and Riley, a Boston terrier.

Sara graduated from Cal Poly San Luis Obispo in 2010 with a degree in Animal Science. She has worked in the Veterinary Industry for the past eight years. Sara loves working at MVSAH because she gets to see the smallest details turn into huge successes.

Some of her responsibilities as Hospital Director consist of managing the veterinarians’ schedules, composing the MVSAH monthly newsletter Paw Prints, directing human resources, organizing Vet Club for youth, and conducting employee evaluations.


To contact Sara, email or call 209-634-0023.

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