Our dedicated team of veterinarians, technicians, rehabilitation specialists and support staff offers extensive experience and expertise. They provide dedicated care and deliver the latest in advanced veterinary medicine to help return your horse to health and soundness.



Mark Rick, DVM

A native of Ann Arbor, Michigan, Dr. Rick obtained his undergraduate degree at Montana State University, continuing on to Washington State University for his veterinary education. Following his doctorate degree, he completed the Surgical Intern/Residency Program at the University of California at Davis where he met his wife, Kathy.  Together they moved to the Santa Ynez Valley and have been an integral part of Alamo Pintado Equine Medical Center from its earliest years.  Dr. Rick and Kathy live in the small town of Ballard where they have raised two sons, Jonathan and Carson.

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Carter Judy, DVM, Dip. ACVS

Originally from Pasadena, California, Dr. Judy attended the University of California at San Diego for his undergraduate work in Animal Physiology and Neurosciences. He then attended the School of Veterinary Medicine at the University of California at Davis. After achieving his veterinary degree, he completed an internship in large animal medicine and surgery at Texas A&M University and a residency in equine surgery and performance evaluation at UC Davis. Having successfully completed the strenuous board accreditation process, Dr. Judy is a Diplomate of the American College of Veterinary Surgeons. Dr. Judy is an internationally celebrated equine surgeon and valued member of the veterinary team at Alamo Pintado.  He resides in the town of Ballard with his family.

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Troy Herthel, DVM, Dip. ACVS-LA

Born and raised in Los Olivos, California, Troy obtained his undergraduate degree in Animal Science and Agricultural Business from Cal Poly San Luis Obispo. He then earned his Doctorate in Veterinary Medicine at Oklahoma State College of Veterinary Medicine. Following graduation, Dr. Herthel completed a year-long internship at Weatherford Equine Medical Center in Weatherford, Texas, focusing primarily on lameness, surgery and reproduction in western performance horses. Dr. Herthel returned to Alamo Pintado, where he completed a surgical residency program and became certified as a Diplomate of the American College of Veterinary Surgeons. He is the youngest son of Alamo Pintado founders, Dr. Doug and Mrs. Sue Herthel.  Dr. Troy Herthel lives in Los Olivos with his wife, Jacie, and daughter, Crosby.


Ed Hamer, DVM

Born in Yerington, Nevada, Dr. Hamer attended the University of Nevada at Reno, where he earned his undergraduate degree. He completed his Doctorate in Veterinary Medicine at The Ohio State University, coming to Alamo Pintado Equine Medical Center as an intern the following year. Dr. Hamer has remained as a staff veterinarian since then, settling in the town of Los Olivos with his wife Tina, daughters Hayley and Kassidy and son Hayden.  Along with treating patients on clinic grounds, Dr. Hamer provides excellent ambulatory veterinary care to the farms and ranches throughout the Santa Ynez Valley, as well as expertise in reproduction and fertility.


Erin Byrne, DVM, Dip. ACVIM

From her hometown of Sunol, CA, Dr. Byrne moved to Davis to complete her undergraduate degree at the University of California, where she continued on to achieve her DVM degree four years later. Following her veterinary education, she moved to College Station, Texas, to participate in the internship program at Texas A&M University, where she remained as a resident in large animal internal medicine. After successfully completing the strenuous board accreditation process, Dr. Byrne became a Diplomate of the American College of Veterinary Internal Medicine, and brings her expertise in internal medicine to the patients of Alamo Pintado Equine.


Greg Parks, DVM

Born in Washington, DC, Dr. Parks moved to California to attend the University of California at Santa Cruz.  Upon completion of his undergraduate degree, he went on to The Ohio State University for his Doctorate in Veterinary Medicine.  Dr. Parks participated in the internship program at Alamo Pintado Equine Medical Center in 1988 and has stayed as a staff veterinarian ever since. Dr. Parks has significant expertise in equine reproduction and fertility, and spends significant time in the field, providing veterinary services to clients in the Santa Ynez Valley and throughout California's Central Coast.  He now lives in the town of Los Olivos with his wife and two children.


Lisa Teske, DVM

Born in Omaha, Nebraska, Dr. Teske moved to Fort Collins to attend Colorado State University as an undergraduate student in agricultural business. After completing her degree, she remained at CSU to participate in the veterinary program. Accomplishing her Doctorate in Veterinary Medicine, Dr. Teske then moved to Alamo Pintado Equine Medical Center where she took part in the internship program. Today, Dr. Teske remains a permanent staff veterinarian, providing ambulatory field services, as well as an expertise in equine acupuncture. Dr. Teske is an accomplished dressage rider.

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Tyler Stevenson, DVM

Dr. Stevenson is originally from the Central Coast of California, and was inspired to pursue veterinary medicine after watching and working with his father, and equine veterinarian. He completed his undergraduate degree at Cal Poly, San Luis Obispo and went on to earn a Doctorate of Veterinary Medicine from the University of California at Davis, where he was recognized by the faculty for his work in the equine clinic and also for his excellence in large animal surgery. Dr. Stevenson then completed an internship at Brock Veterinary Clinic in West Texas, followed by a year under the tutelage of Dr. Joe Carter at Oklahoma Equine, focused on lameness and sports medicine. In his spare time Dr. Stevenson enjoys riding, fly fishing and playing the guitar.


Wade Walker, DVM, Dip. ACVS-LA

Wade is a 3rd generation veterinarian from La Canada Flintridge, California. He achieved both his undergraduate degree in Biological Sciences and his Doctorate in Veterinary Medicine at Colorado State University. During this time he was employed as a research assistant at the Equine Orthopaedic Research Center. Dr. Walker completed an Internship at Arizona Equine Medical and Surgical Centre followed by a Large Animal Surgery Residency at Cornell University. Wade gained further experience as a staff surgeon at both San Luis Rey Equine Hospital in Bonsall, California and Chaparral Veterinary Medical Center in Cave Creek, AZ prior to joining the team at Alamo Pintado.



Carolina Lopez, DVM

Born and raised in Bogota, Colombia, Carolina grew up riding jumpers and dressage horses. She went on to earn her Veterinary degree at La Salle University in Colombia and pursue her interest in equine internal medicine and ophthalmology. A former Alamo Pintado Equine intern, Carolina has returned to serve our patients after earning her master's degree and completing her residency. With a special interest in teaching, she looks forward to mentoring interns and externs at Alamo Pintado and to providing clients with thoughtful continuing education. In her spare time Carolina enjoys any outdoor sport, especially cycling and hiking with the company of her beloved miniature American Shepherd, Feliz.




Lauren Hunter

Lauren Hunter grew up just down the coast from the Alamo Pintado clinic, in the town of Thousand Oaks, CA. She has been riding since she was three years old and has always had a love and passion for animals, especially horses. Realizing a life long goal of becoming a veterinarian and beginning her career at Alamo Pintado is a dream come true.

While obtaining her Bachelor of Science degree at UC Davis, Lauren worked at the Equestrian Center, assisted in research at the vet school, and was also president of their intercollegiate dressage team. During breaks she worked as an ambulatory equine technician with her mentor of nearly ten years.

Lauren went on to earn her Doctorate of Veterinary Medicine from Western University of Health Sciences where she was able to work with exceptional doctors and technicians across the United States. During vet school she was a board member for the veterinary business management club, as well as president of the student chapter of AAEP where she helped organize bi-annual low cost clinics to assist equestrian communities in the Los Angeles area.

Lauren’s interests include sports medicine, surgery, ambulatory practice, and equine acupuncture. She also has a soft spot for miniature horses. In her time off, she enjoys baking, traveling, watching football, and spending time with family.


Rudy Hermosillo

Rudy Hermosillo was born and raised in East Los Angeles, California. From a very young age he was around horses.

While taking care of the horses that belonged to his family and friends, Rudy developed an interest in not only caring for the amazing equine species, but also treating them medically. The interest developed into a passion, which led him to pursue a degree in veterinary medicine.

Rudy received his degree from the Institute of Veterinary Science Research of the Autonomous University in Baja California. While in school, Rudy became fascinated with all aspects of the equine veterinary field, but has special interests in the areas of anesthesia, surgery and emergency medicine.

In his free time Rudy enjoys running, hiking, playing sports and working on his classic car with his father, but he especially likes to spend time with his family and his dog Maya.


Zuzanna Pietras

Zuzanna Pietras grew up in the city, but started riding horses when she was seven years old. When she was twelve her family bought a mare named Evivva L'Arte (AKA “Viva”). Zuzanna competed in junior level show jumping. Then Viva became lame, so Zuzanna had to retire her. Not all was lost, for the chronic lameness issues and long treatment of her horse helped Zuzanna realize that she wanted to be an equine veterinarian. She was actually still in middle school when the passion to help horses overtook her.

Zuzanna graduated first in her class from the Faculty of Veterinary Medicine at Warsaw University of Life Sciences in Poland. She completed multiple externships in well-renowned equine hospitals in Dubai, the United States, the United Kingdom, Ireland, Canada, France, Belgium, Germany, and Poland. She was also a Student Steward at the British Equine Veterinary Association Congress in 2015, 2017, and 2018.

Zuzanna has particular interests in equine surgery and emergency/critical care medicine and is hoping to complete a surgical residency after her internship at Alamo Pintado.

In her spare time, Zuzanna enjoys traveling, hiking, reading and spending time with my family, friends and her pets (in addition to her horse Viva, who is now 21-years-old, she has a rescue dog named Charlie and a cat named Frycek.


Adriana Barba

Originally from Quito, Ecuador, Adriana completed her studies at University San Francisco de Quito. Her passion for traveling and her innate curiosity for equine surgery has led her to study veterinary medicine in South Africa, Colombia, Chile, the University of California, Davis, and France. During Adriana’s first year-long internship at the University of Lyon she became fluent in French, her third language, after Spanish and English. Following her internship at Alamo Pintado, Adriana looks forward to pursuing a residency in equine surgery.

In her free time Adriana enjoys snorkeling, Jiu Jitsu, psychological thrillers and reading.


McKenna Caspers

McKenna Caspers was raised in the Twin Cities of Minnesota, where she was introduced to the equine industry through showing Arabian horses.

While attending Colorado State University for undergraduate studies, she discovered her passion for veterinary medicine, which was fostered through spending several semesters working as a veterinary assistant at Hagyard Equine Medical Institute in Lexington, KY. While at Hagyard, McKenna was able to work with some of Kentucky’s large Thoroughbred farms.

Subsequently, McKenna obtained her Doctorate degree at the University of Minnesota College of Veterinary Medicine where she developed a strong interest in Equine Surgery, Sports Medicine, and Diagnostic Imaging.

When she has time away from the clinic, McKenna enjoys discovering new podcasts, and hitting the trails with her Arabian horse Brass Ring CRF (pictured here).







Ky Mortensen, JD, MBA

A Colorado native, Ky serves as Chief Operating Officer to the Alamo Pintado team.  He holds an equine science degree from Colorado State University, an MBA from Louisiana State University, and a law degree from Southern University Law Center. Ky began his career in the veterinary industry with the American Association of Equine Practitioners followed by an appointment with the Equine Health Studies Program at the LSU School of Veterinary Medicine. Prior to joining the team at Alamo Pintado, he oversaw Texas based veterinary practice management firm, Inova Partners, working with equine veterinary practices nationwide to help them achieve their business goals. He and his wife Victoria, along with their sons Beck and Jett, now make their home in the Santa Ynez Valley.