Meet Our Team

Dr. Steve Loncosky
Owner, Veterinarian

Dr. Steve Loncosky attended Cal Poly, San Luis Obispo for his undergraduate degree in Animal Science and a minor in Equine Science. While at Cal Poly he also became certified as an Equine Dentist where he worked with several veterinarians providing proper equine dentistry to their client’s horses. He then headed to Los Angeles County to complete veterinary school at Western University. After graduation, Steve completed an internship with Steinbeck Country Equine Clinic in Monterey, California. Throughout his time at Steinbeck, he rotated between Surgery Service and Ambulatory Service. Being intrigued by surgery, Steve focused more on the surgery aspect of Steinbeck’s practice, such as colic surgery, neurectomies, arthroscopies, and many more. In his spare time during his internship, Steve volunteered on many outreach trips locally, nationally, and internationally. These trips provided veterinary services to communities in need; such as spaying/neutering dogs/cats, equine castrations, and routine care. Upon completion of his internship, he and his wife, Korina, moved to the Center Ranch in Texas. As a resident veterinarian on a high caliber cutting horse ranch, Dr. Loncosky provided lameness care to the resident horses in training and produced embryos for their large embryo transfer program. He assisted with cattle work on the ranch and even helped open a small animal clinic that offered affordable services to the local community. After a stint in Texas, and Korina pregnant with Carter and Hayden (the twins!), they decided to head back to their roots. Since Korina grew up in the great community of Cottonwood, and Steve loved Northern California, they knew this area would be a great fit. Dr. Loncosky joined the Cottonwood Vet Clinic team in 2012, specializing in horses, but providing services to all animals in the Cottonwood region. Dr. Steve and Dr. Kevin Terra purchased Cottonwood Veterinary Clinic and Cottonwood Small Animal Clinic in 2015.

During Dr. Steve’s spare time, he enjoys spending time with his wife Korina, and boys, Carter and Hayden. He also enjoys hunting, fishing, traveling, hanging out with his two dogs, and riding his horse, Moonshine.

Dr. Kevin Terra
Owner, Veterinarian

Dr. Kevin Terra joined the staff at Cottonwood Veterinary Clinic in the summer of 2013. Originally hailing from the Turlock area, Dr. Terra’s family has operated dairy farms in the Central Valley for the past 80 years. Dr. Terra was exposed to veterinary medicine from childhood by his father who practiced dairy medicine in the Turlock area. Kevin inherited his father’s love for veterinary medicine and decided at an early age to become a veterinarian. After completing a B.S. degree in Cell and Developmental Biology from UCSB, Dr. Terra conducted research in protein remodeling and cancer at UCLA. Following the culmination of his research projects at UCLA Dr. Terra attended Western University of Health Science where he obtained a degree in Veterinary Medicine. Upon graduation Dr. Terra moved to the Millville area where he practiced prior to working at Cottonwood Vet Clinic. His professional interests include ruminant (cow and goat) reproduction and medicine, equine general practice, and small animal medicine and orthopedic surgeries. Dr. Terra previously served as the Vice President of the Northern California Veterinary Medical Association. Dr. Terra has also received advanced training in small animal orthopedic surgery.

In his spare time Dr. Terra likes to spend time with his family, read books, fish, camp, hunt, and home brew. Mostly he hangs out with his two daughters, Olivia and Juniper.

Dr. Oscar (Bill) Hooton
Associate Veterinarian

Bill is a native of Californian. He was raised in the rural central coast of California. His secondary education took place in Chico, and he earned his DVM from UCD in 1978. Dr. Hooton started veterinary practice in clinics in Anderson, Corning and Red Bluff California. He was owner-partner at Antelope Veterinary Hospital in Red Bluff for 24 years. His hobbies include traveling, hunting and equitation. He has chased foxes and stags in England and he enjoys helping the neighbors work their cattle. Bill also enjoys writing cowboy and veterinary poems.

Dr. Mandy Murdock
Associate Veterinarian

Dr. Mandy Murdock grew up in Washington State and developed an early interest in both horses and veterinary medicine. She received her BS in Animal Science from Cornell University in 2012 and her DVM from Washington State University in 2017. Following graduation, she completed an one year equine internship at Pilchuck Veterinary Hospital in Snohomish, Washington. In her spare time, she enjoys hiking and running with her dog, Chloe.


Dr. Melissa Siegrist

Dr. Melissa Siegrist grew up on a small equine breeding farm near the outskirts of St. Charles, Missouri. It was walking the halls of the equine specialty hospital next door that inspired a 5-year old Dr. Siegrist to pursue a career in veterinary medicine, wherein she could merge her passions for science, animals, and the outdoors. Through the Pre-Veterinary Scholars program, she was pre-accepted to the University of Missouri College of Veterinary Medicine, aspiring to become an equine practitioner. However, her professional interests shifted with growing experience, and she expanded her interests to include reproductive medicine of all domestic species. It was the case diversity and the mountains that called Dr. Siegrist to Northern California. In her spare time Dr. Siegrist enjoys reading, crafting, tea, and all things outdoors.


Dr. Erin Holland

Dr. Erin Holland, originally from Northern Virginia, attended Virginia Tech and earned her bachelors in Animal and Poultry Science, where she first fell in love with cattle and small ruminants. She stayed at Virginia Tech for four more years to earn her DVM from The Virginia-Maryland College of Veterinary Medicine, with a focused interest in farm animal medicine and surgery. She enjoys small animal medicine as well and has a special interest in supporting the mental health of veterinary students and practitioners. She helped to create a course teaching emotional intelligence to veterinary students. 
When Dr. Holland is not on call, she enjoys reading a good book, hiking with her dog, Mila, kayaking, traveling, and enjoying the local breweries.

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Dr. Isaac Secor

Dr. Issac Secor enjoys the variety that mixed animal practice offers and looks forward to helping you care for your dog, cat, llama, cow, and just about anything (including hamsters!). He has a special passion for sheep and goats, having trained at the US Sheep Experiment Station and a 12,000 head goat farm. He also served as president of the small ruminants club during his time in veterinary school. Isaac grew up in Stillwater, MN where he worked at a dairy farm and a horse stable. He helped care for dogs, cats, chickens, sheep, and bees at home. He obtained an undergrad degree from St. John's University in Collegeville, MN and a DVM from the University of Minnesota. 

Outside of work he can be found running, climbing, skiing, playing cribbage, practicing piano, eating ice cream, and exploring the beautiful outdoors of Northern California with friends!

Dr. AJ Martin

Dr. AJ Martin

Dr. Martin was born and raised on a dairy farm in Chino, CA. He graduated from CalPoly San Luis Obispo with a Bachelors Degree in Dairy Science. After 2 years of managing the family dairy farm he decided to return to school and earned his DVM from Oklahoma State University. Upon graduation, he practiced in Fresno County at a mixed animal practice with an emphasis on dairy cattle. When his fiancé graduated from Oklahoma State with her DVM they knew they were ready to come to northern CA! He is his happiest when he is spending time with his family, his fiancé, and his dog Karma. He enjoys snowboarding, hiking, and surfing. His professional interests include orthopedic and soft tissue surgery, herd health, farm animal medicine, and building lasting relationships with his clients and their animals.

Dr. Gina Langford

Dr. Gina Langford

Dr. Gina Langford grew up in a small town in Northern Ohio. Exposed to all types of animals her whole life she knew she always wanted to work with animals. Dr. Langford attended college at Youngstown State University and received her Bachelor’s in Science majoring in biology in 2016. After college, she graduated vet school at Western University in Health Sciences in 2020 focusing on mixed animal practice. In her free time, she likes spending time with family and being active outdoors.

Dan Lay
Practice Manager

Shelley Scheidecker,
Registered Veterinary Technician

Receptionist - Small Animal

Kayla Will

Rigo Zapian
Hospital Grounds & On-Site Tech


Sydnee Herrick

Kennel staff

Kennel staff


Large Animal Vaccines and Pharmaceuticals

Jessica Vorhis
Large Animal Receptionist

Shelby Fogel

Hailey White,
Certified Veterinary Assistant


Rebecca Lopez
Small Animal Receptionist

Katherine - Technician



Kennel Technician




Find us on the map

Office Hours

Our Regular Schedule


8:00 am-5:00 pm


8:00 am-5:00 pm


8:00 am-5:00 pm


8:00 am-5:00 pm


8:00 am-5:00 pm


Small Animal Only: 9:00 am - 1:00 pm




Read What Our Clients Say

  • "Many thanks to Dr. Paxton for being wonderful with my little blocked goat. She was kind and patient while figuring out what he needed most. The assistants and office staff were great too."
    Rachel W./FB
  • "As always - thank you Cottonwood Vet and Dr. Terra for your phenomenal care of both my horse and niece! It was miserable hot yesterday and you guys were so great with her and Tater. As long as I’m having horses stapled together and nieces passing out, I wouldn’t want to be anywhere else. ��"
    Jacqulyn S./FB