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Mary Thomas, DVM

Dr. Mary Thomas graduated from the Washington State University College of Veterinary Medicine with honors in 1984. Growing up in Prosser she took her own pets to the Prosser Animal Hospital and began her career working there for Dr. Douglas Jackson. Originally this was a mixed practice which included veterinary care for horses and cattle. She and Dr. Sue Wedam purchased the practice in 1987. Dr. Wedam is now head of the veterinary technician program at Yakima Valley Community College.

Dr. Mary loves the people and town of Prosser and cannot imagine living anywhere else! Veterinary medicine has been her passion since the age of three and she feels blessed to have been able to fulfill this dream. Her favorite part of practice is surgery and being able to truly make a difference for people and their pets. She and her staff are working hard to provide the pets of Prosser with high quality, compassionate medical care.
Dr. Mary currently shares her home with her husband and two younger children, as their older two children are in college. Many pets make for a happy, if not always clean, home! She enjoys working in the dirt, skiing, needlework, scrapbooking, camping, and all the kids' activities. Dr. Mary is convinced that teaching ourchildren to love and care for a pet will make them better members of our society.

Celesté Lynn, DVM

Celesté Lynn is one of Prosser Animal Hospital’s two full time veterinarians. She has been with us since 2009. Dr. Lynn supports Prosser Animal Hospital in the diagnosis and prevention of infectious disease, internal medicine, anesthesia and surgery, radiology, and dentistry. Dr. Lynn is licensed to practice veterinary medicine in the state of Washington and is licensed to issue health certificates for the transport of animals. Dr Lynn continually seeks continuing education opportunities through her memberships in the American Veterinary Medical Association and Washington State Veterinary Medical Association, as well as the online Veterinary Information Network and others.

Dr. Lynn graduated with her Doctor of Veterinary Medicine degree from Washington State University’s College of Veterinary Medicine. Prior to medical school, she earned her Bachelor’s of Zoological Science from Washington State University.

A Little More About Dr. Celesté Lynn:

Dr. Lynn knew she wanted to be a veterinarian since she was four years old, living on her family’s hobby farm outside the city limits of Moses Lake, Washington. She grew up with sage brush, cheat grass, all kinds of pets and livestock, and loved every minute of it! She moved to Prosser shortly after graduation firstly because the staff at Prosser Animal Hospital impressed her not only with their competence and love for animals, but also with their congeniality and cohesiveness as a team. She loves Prosser’s small town atmosphere, quiet neighborhoods, and warm weather.

Dr. Lynn is married to a geologist, with whom she loves to cook, go backpacking, berry-picking, and camping. Dr. Lynn is also an avid reader, so if you have any great suggestions for hiking trails or good literature, be careful not to mention it in an exam room, because she may become very distracted!

Dr. Lynn and her husband have a son, Malcom, who is also becoming quite an animal lover! They also have two loveable, friendly female dogs, both of which were born in the summer of 2009. Atlas is an ultra-intelligent, emotional, hyper Border Collie cross who is still trying to master the difficult art of combining cuddling and wiggling. Atlas is quite independent, yet loyal and eager to please; she loves to run, jump, and explore. Atlas was named after the book Atlas Shrugged, by Ayn Rand. Vega is an easy-going, ALWAYS happy, fearless German Shorthair/Labrador cross. Vega’s favorite things include breakfast, toys, licking people, getting wet, dinner, and running. Vega’s name means “spirited,” but may soon mean “always hungry.”

Ronda McCoy: Kennel Worker/House Keeping

Ronda has lived in Prosser most of her life and graduated from Prosser High School. In 2010 she joined our team as a kennel worker. Having been around animals all her life she enjoys making their time away from home comfortable and enjoyable. Ronda always makes sure they have a comfy blanket and fresh food and water. She cares for both hospitalized patients and boarding pets, and assists the doctors with weekend rounds. Ronda has a huge heart and is often seen giving extra attention to your pet! She also cleans and disinfects the entire clinic daily.

Julie Rohman: Veterinary Assistant

Julie has lived her entire life in Prosser. From childhood she has had a passion for animals and was originally a client here at Prosser Animal Hospital, taking care of MANY stray cats in need of a good home. She and her husband now have two dogs (Luna and Tres) and multiple cats. Julie is a veterinary assistant and is certified in Companion Laser Therapy she enjoys easing pain in post-surgery patients, and those suffering from arthritis and other painful conditions. Cats are Julie’s passion! Over the years she has adopted countless homeless cats and is a firm believer in spaying/neutering pets. The number of homeless kittens we see yearly here at the clinic is heartbreaking. She is an advocate for these helpless creatures by encouraging responsible pet owners.

Amanda Shepard:Veterinary Assistant/Receptionist

Amanda has lived in Prosser her whole life. She graduated from Prosser High School in 2002. Amanda grew up helping her dad on the farm and loved caring for the animals. She has worked in the health care industry for over 6 years and is very happy that she has been able to combine her love of animals and medicine here at the Prosser Animal Hospital. Amanda works as a veterinary assistant and a receptionist. She has an adorable Boston terrier and three children that keep her busy in her daily life. Some of her hobbies are camping, fishing, scrapbooking, and cooking.

Kathy: Groomer

Kathy has been grooming animals for 36 years. She previously raised and showed Miniature Schnauzers, Standard Poodles and German Wirehaired Pointers. She also used to field trial and hunt German wirehaired pointer’s. She specializes in terriers but knows how to correctly groom all breeds including mixed breeds. Through grooming Kathy allows their individual personalities to emerge. Kathy competed in competitive grooming contests for 10 years and won several accolades. She has extensive knowledge in skin conditions and behavior capabilities that allow her to groom animals that have previously needed sedation for grooming. She currently lives with two Miniature Schnauzers “Chassis and Driver”, a German wirehaired pointer “Bristol”, a Bengal Cat “Crue the Warrior King”, a feral kitty “PC” and one Quarter Pony.


Pam was born in San Jose, California and moved to Prosser with her husband in 2007. She loves the small town atmosphere and the friendly people. Pam is a veterinary assistant and loves working with animals. Pam enjoys working on dentals because of the huge improvement that can be observed after cleaning teeth that have tartar build up. She also really enjoys working on blood laboratory tests. At home Pam has two Yorkshire terriers “Tess” and “Walter”, two Labradoodles “Sam” and “Jack”, and a Chihuahua mix named “Maggie”. She enjoys camping, cooking, reading and gardening.


Gina and her family moved to Prosser in 2003. She was born and raised in the Blue Mountains of Walla Walla. When Gina was about ten years old she enjoyed participating in 4-H and FFA, showing sheep and pigs. Gina has always been an animal lover and is delighted to have a job working with animals. Gina and her family have three dogs named Oscar, Ruger and Camo, one cat named Smokey and a Quarter horse named Lucky Lena, which was adopted from Spot-O-Faith Farms in Pasco. She enjoys spending time with her family camping and horseback riding.

Kortney Yahne, LVT

I have lived in Prosser my entire life. I graduated from PHS in 2009. Growing up on a small farm with cows, goats,chickens, ducks, and a llama instilled my love of animals. I attendedU of I for two years then transferred to YVCC and graduated from the Vet Tech Program in 2013. I currently have a dog name Chevy. I enjoy living in the country and spending time outdoors.

Kendra Stice

Has always had a passion for working with, and caring for animals that begun well into her younger years. Growing up in a small, rural farming town, it would be safe to say that her livestock assortment included the full roster. Within her family she had commonly been referred to as the animal lover; it was no secret that her future would include a life filled with animals of all sorts. In high school she participation in the National FFA Organization included showmanship in the steer and pig divisions.  Her efforts had also extended well into many Career Development Events also within the same organization. As for her current “herd” if you will, she has two horses which she enjoys riding in her free time, 12 chickens, a cat, and five dogs. Which include her two yellow labs, two German Shepard mixes, and Jack her Corgi and Border collie mix. She also loves to cook, garden, scrapbook, fish, and go camping. Between home and the Clinic, it’s safe to say pets are major part of her life.