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Get to Know Us

Explore our staff biographies and learn more about the people who make our facility an excellent choice for your pet care needs.

Wes Wittman, DVM.

Dr. Wes Wittman is the practice owner, and full- time mixed animal veterinarian. He worked as a high school student for Dr. Lew Bergstorm in the '70's, and always knew he wanted to go into veterinary medicine. He graduated from UC Davis Veterinary School in 1982, and returned to Sonora to continue his career in veterinary medicine. He bought the property at Mono Way on 1998, and with some remodeling a few years later, has expanded into a full-service facility for mixed animals. Dr. Wittman strives to keep current with his knowledge and education in the field of veterinary medicine, and is always supportive of his employees and continuing their education as well.

Julie Clements, DVM.


Dr. Clements attended Veterinary Medical school at Oklahoma State University. She loves working in the veterinary field, especially surgical cases and Equine reproduction.She was involved in the first documented case of Blister Beetle poisoning ever recorded at at the age of 12. Dr Clements became interested in helping animals when her beloved Dachshund, Herman, was paralyzed with disc disease. Dr. Clements raises cow horses at her ranch in Calaveras County. She also has dogs, goats and a Bureau of Land Management burrow and mustang.

Dr. Lauri Grasse, DVM

Dr. Lauri Grasse graduated from UC Davis Veterinary School in 1989. For the first three years after graduating, she practice both large and small animal medicine, but then switched to solely treating dogs and cats. She has always had a special interest in internal medicine and dermatology. Dr. Grasse lives in Sonora with her husband and daughter. At the moment, she has an elderly, eccentric Border Collie and a wild, crazy terrier mix, as well as six cats! Only one of the cats was intentionally adopted, the others just showed up. She enjoys living and working in beautiful Tuolumne County, although the summers get a little too hot.

Dr. Peter Walsh, DVM, DACVS (Surgery)

Dr. Peter Walsh is a 1994 graduate of Colorado State University School of Veterinary Medicine. He also has a Masters Degree in Veterinary Science. He completed an internship in small animal surgery and medicine and a surgical residency at the Western College of Veterinary Medicine in Saskatoon, Saskatchewan, Canada. Dr. Walsh joined the faculty at the University of California Davis where he rotated coverage for all three of the small animal surgical services, and was ultimately instrumental in developing and running the small animal surgical oncology service. He is now in private practice, and started Veterinary Specialists Group (VSG) which provides both orthopedic and soft tissue surgical service in the Northern California area. Dr. Walsh is board certified with the American College of Veterinary Surgeons, and has a particular interest in surgical oncology and reconstructive surgery. He is considered one of the leading authorities on limb spare procedures in dogs with bone tumors.

Veterinary Technicians:

Patty - Registered Veterinary Technician


Patty has worked at Mono Way Veterinary Hospital since January 2000. She became involved in the veterinary industry to learn the skills needed to take care of her animals. Patty loves the variety of animals we treat and the interaction with them while they are in the hospital. She has 4 dogs and a cat at home. When she is not at work, she enjoys going to see a movie, reading, horseback riding and just hanging out with her family at home. Patty attended Consumnes River College in Elk Grove, where she graduated with her RVT license.

Patti - Registered Veterinary Technician

Patti is a Registered Veterinary Technician, and has been in the veterinary field for over 30 years. She began working at Sonora Veterinary Group with Dr. Wittman, and moved to Mono Way when Dr. Wittman bought the practice. She earned her degree in Animal Health at Modesto Jr. college, and a Veterinary technology degree through Consumnes River College in Elk Grove. Patti is part of our management team, and handles inventory and supplies. Her interests are dentistry and internal medicine. She is also very involved with her family, and their own animals and 4-H.

Heather - Registered Veterinary Technician

Heather joined our team in January 2007. She began as a Kennel Technician, and while she was employed here, went to school and obtained her RVT license. Her drive came from her desire to be able to help sick or injured animals. Heather's greatest joy is getting to see all of the puppies and kittens. Her favorite animals are dogs, so she has Old English Sheepdogs and one Cock-A-poo at home. In her off time, she enjoys showing her dogs at dog shows.

Beth - Veterinary Technician

Beth has worked at Mono Way Veterinary Hospital since 2005. The best part of her job is working with all the different kinds of animals, large & small. She also enjoys seeing the new puppies and kittens that come in and watching them as they grow. Beth likes getting to know the clients and being there for them. She loves animals and loves learning about all of the diseases animals get, along with what to do to cure them. Beth's favorite animals are horses, goats, dogs, cats and birds. When she is not at work, Beth is busy horse back riding, doing junior rodeo with her kids, gymkhana and playing on the lake.

Nealy - Registered Veterinary Technician/Receptionist


Nealy has been working at Mono Way Veterinary Hospital since 2004. She started out as a volunteer one day a week in the Groveland Clinic and now works full time as a receptionist and is enrolled at Modesto Junior College, studying to get her RVT license. Nealy wanted to work in the veterinary industry because she loves animals and wanted to be able to take care of her own. Nealy likes seeing happy, well cared for pets and enjoys meeting all the different breeds. Her favorite animals are dogs. In her spare time, she likes traveling, outdoor activities, baking, and taking naps.

Kelly McEwen - Veterinary Technician

Kelly McEwen was born and raised in Sonora, California. Many community members may know Kelly and her family due to their active involvement in 4-H and FFA. After graduating from Sonora High School, she went on to pursue her education at the University of California, Davis. During her time at UC Davis, she continued her energetic commitment to the agriculture industry by becoming a strong spokeswoman for the beef industry through leadership roles in the UC Davis Young Cattlemen's Association, as well as traveling the nation on the Cal Aggie Judging Team , where she competed as several Livestock Judging competitions. Kelly was the Bran Resident at the UC Davis Hopkin Avian Facility, where she worked with laying hens and many research projects. She was also the Student Breeding Manager and Herdsman at the UC Davis Beef Barn and Feedlot. In 2016, she graduated with a Bachelor of Science Degree in Animal Science and a specialization in Livestock Production. In the future, she plans to return to school to obtain either a PhD in Ruminant Nutrition or Veterinary Science.


Kim - Receptionist


Kim has been with Mono Way Veterinary Hospital since 2005. She enjoys seeing all of the animals leave healthy and happy. Kim has grown up around animals and wanted to join a field where she could use her knowledge to help others. Kim has few dogs, sheep and cats at home. Kim graduated from CSU Fresno with a Bachelors of Science degree in Animal Science.

Rachel - Receptionist

Rachel joined our team in January 2012. She originally started working with Dr. Wittman in 1992. She took time off to raise her daughter, and was welcomed back after 13 years. For Rachel, the best part of her job is seeing the variety of pets and the relationships they have with their owners. She also enjoys educating clients on pet care. The most difficult part for Rachel, is having to say goodbye to a pet. Her favorite animals are Poodles and Golden Retrievers. As hobbies, Rachel enjoys journaling, photography and spending time with her family. She has a Poodle named Becket and two cats, Lucky and Seven.

Johnna Kiernan - Receptionist

Johnna Kieran joined our team in April of 2011. She has been around animals all her life. For Johnna, the best part of her job is seeing the love and excitement on the faces of both owner and pet when clients come to pick up their pet. She most enjoys the unconditional love animals provide. Her favorite animals are horses, dogs and pigs. Outside of work, Johnna enjoys working cattle and participating as an active member of the Mid Valley Cowbells and Native Daughters of the Golden West.

Ace - Hospital Security/Greeter


Ace was hit by a car and initially thought to be dead until he showed signs of life here at the hospital. He was treated for wounds and a broken Tibia. His favorite things are greeting clients, lounging on the front counter and sitting on top of the cat carriers in the front lobby.

Tui - R.I.P


Tui was found hit by a car on the side of highway 108 by a former veterinary technician. The technician was from New Zeland and named him after a black and white bird, called a Tui bird. Tui had a fractured leg and damaged eye which were repaired by Dr. Clements. Unfortunately, Tui developed a seizure disorder and, after many months of treatment, he went to the Rainbow Bridge. We love and miss you, TUI!

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Office Hours

Monday Tuesday Wednesday Thursday Friday Saturday Sunday
7:30am 7:30am 7:30am 7:30am 7:30am 8:30am Closed
6:00pm 6:00pm 6:00pm 6:00pm 6:00pm 12:00pm Closed

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Our family pets have gone to Dr. Wes Wittman and staff for over 20 years. His care has exceeded any expectations we have ever had. He even performed a c-section on our rabbit! Our pets are an extension of our family and have always been treated so with Dr. Whitman.

With Gratitude,
The Arnold Family.

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