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Our Practice

We are a full-service animal hospital providing comprehensive pet healthcare services in Issaquah, WA. Our veterinarians offer a wide variety of medical, surgical, and dental services. Our hospital has advanced equipment and technologies, including comprehensive in-house testing for accurate diagnosis, digital x-ray, surgical suites, dental suites, and a pharmacy. We are committed to providing quality care at every stage of your pet's life. From routine preventive care to early detection and treatment of a wide range of conditions and diseases, we have the expertise to provide the highest standard of care for your pet. We also serve Samammish, Renton and Renton Highlands, Bellevue, Newcastle, Issaquah Highlands and the surrounding areas.

  • Dr. Winnie Peng


    Dr. Peng has lived and practiced veterinary medicine in the Issaquah area for over 20 years.

    Originally an Arizona native, she went to undergrad and veterinary school at Colorado State University. She graduated summa cum laude, and was among the top of her class. Her areas of expertise include internal medicine, dentistry, endoscopy, and surgery.

    In 1999, she moved up to the Pacific Northwest where she met and married her wife in 2014. Their four-legged kids are a feisty kitty named Colby, a loyal rescue golden named Jackson, an adorable rescue pup named Mak and in spirit, a beloved handsome beagle named Rolo who was the inspiration for this hospital.

    Her interests outside of work include travel, golf, and craft brews!

    Dr. Peng also speaks English, Mandarin, and Spanish.

  • Dr. Mary Ellsworth

    Chief of Staff/Veterinarian

    Has lived and practiced veterinary medicine in Washington for a collective of over 20 years altogether! She worked as an emergency veterinarian in the Issaquah area for the past 10 years and prior to that was a technician in internal, emergency & shelter medicine.

    Originally a California native, she went to veterinary school at Washington State University. She completed a year of surgical and medicine rotating internship at VSC and has additional training in ultrasound and endoscopy. She loves developing treatment plans for her geriatric patients to ensure they live out their senior years comfortably. She loves her older patients!

    Her interests outside of work include antique shopping & exploring the city with her boyfriend & cute daughter toddler! She also has two cats: Sophie & Harriet.

  • Dr. Erin Russell


    Dr. Erin Russell joined our Cobblestone family in 2020. A born Hoosier, she moved to the Seattle area prior to earning her doctorate of Veterinary Medicine in 1998 at Washington State University. After graduation, she moved to NYC where she spent 12 rewarding years practicing exotic and small animal medicine in Manhattan and Queens.

    During her tenure in NYC, she annually served as one of the attending veterinarians at the Westminster Kennel Club Dog Show. Dr. Russell served as a board member for The Veterinary Medical Association of New York City. They presented her with a Merit Award in 2007 for recognition of her significant contribution to the VMA of NYC and the advancement of the veterinary profession. In 2002, she was co-awarded the Outstanding Service to Veterinary Medicine Award for her efforts at Ground Zero.

    Dr. Russell married her high-school sweetheart from Vashon Island and returned to the Pacific Northwest in 2010 where she continued to lovingly care for dogs and cats.

    She is accomplished at working up and managing complex medical cases and preparing pets for international travel. Her favorite areas of interest are dermatology, gastroenterology, endocrinology, preventative medicine, and client education.

    When Dr. Russell is not practicing medicine, she loves to spend time with her 10 spoiled chickens, her 3rd West Highland Terrier – Lilly, and her two boys, James and Finn. Her husband, Owen, is a veteran of Operation Iraqi Freedom and Operation Enduring Freedom.

  • Jasmine Bun

    Practice Manager

    She is a California-native that moved to the PNW in 2017. She has been in the Veterinary Medicine field since 2014. She’s crossed trained as a receptionist, tech and now manager!

    Her passion for animals, especially dogs, has motivated her to launch her own pet-sitting business, which she does outside of work called HooDogs Professional Dog Lovers.

    A few of her favorite pastimes include road tripping to the Oregon coast with her fiancé & dog-children: Hazel, a shih-poo and Truffle, a chihuahua. trying new foods around town or in Seattle, attending Seahawk games, cooking, gardening and running their pet-sitting business out of their home! She is a potato enthusiast (loves fries!) & loves a good crime or medical show here and there.

  • Audrey

    Licensed Veterinary Technician

    Audrey grew up in Issaquah while enjoying cat 4-H and taking care of her family goats and chickens. In 2001, she decided to enter veterinary medicine out of a love for animals and a desire to help others. After many years of expanding her knowledge in general practice she earned her technician license in 2007.

    She has a passion for client education and dentistry. She also loves to attend veterinary conferences to keep her knowledge sharp.

    Audrey lives with her husband, son, a cat named Turbo, and a German Shepherd named Blazer. She enjoys family outings at the beach, kayaking, mountain biking, and skiing.

  • Allie

    Licensed Veterinary Technician

    Allie became a veterinary assistant in 1997 and worked at a small animal clinic in San Diego. In 2004, she decided to go back to school to become a Licensed Veterinary Technician and graduated from Mesa College with a degree in Animal Science.

    She moved to the PNW in 2005 to be closer to her family and to enjoy all that Washington has to offer. She loves working with the Cobblestone team to provide compassionate care to our clients and their pets.

    When not at work, she loves the outdoors, spoiling her 2 cats, crafting, music, and spending time with friends and family.

  • Kent

    Licensed Veterinary Technician

    Kent is originally from Kirkland, Washington and now lives with his wife Kelly on their hobby farm in Cle Elum. He was previously a middle school teacher in the Snoqualmie Valley from 1993 to 2015.

    He retired from teaching and attended PIMA Medical Institute to become a Licensed Veterinary Technician in 2017! The Christensen’s share their farm with horses, goats, sheep, dogs, cats, chickens, and 2 mini pigs. When not helping animals, he enjoys hiking, backpacking, fishing, and riding his horses (& making pickles!

  • Jen

    Licensed Veterinary Technician

    Jen was born and raised in Colorado but has lived in Washington for the past 12 years. She started working in a boarding kennel at age 13 and eventually attended Bel Rea Institute to obtain an AAS in Veterinary Technology in 2007. She has a special interest in emergency/urgent care, client education and kitty behavior.

    Outside of work she enjoys spending time with her boyfriend and silly kitty Westley, paddle boarding and gardening.

  • Rebecca

    Veterinary Assistant

    She grew up in Bellevue and is a true Washingtonian. She attended Washington State University where she studied Business Administration. Go Cougs!

    After working several years for a major local airline and then a large international business travel company. Rebecca knew she needed a change.

    She found an opportunity as a receptionist for a local veterinarian and was quickly “bitten” by the bug. Her love for the animals and a strong desire to be more involved in their care, led her to start learning and training to help with patient care and medical procedures.

    Rebecca took a break from working and was a stay-at-home mom for almost 10 years, but soon the desire to help and care for our furry family members became too strong. The opportunity to work at Cobblestone presented itself at the purrrrfect time and she couldn’t be happier to be back in the saddle again!

    Rebecca is married to her wonderful husband of 15 years. They have a 10 year old son, along with their two cats: Pickles and Relish. She enjoys cooking, entertaining, traveling, spending time with family and friends and the occasional winery.

  • Karen

    Veterinary Assistant

    She is originally from California but has lived in Florida for the last 26 years before moving to Washington in 2018.

    She has been in the veterinary medicine field for 24 years!

    Outside of work she enjoys spending time with her husband, 2 dogs: Sunny & Buc, a cat: Willie, and 4 grandchildren.

  • Erika

    Veterinary Assistant

    Born and raised in Washington State, but her heart belongs to the ocean. Much more of a
    beach bum than a snow bunny for sure! After graduating from Interlake High School, she
    decided to skip college and work for a bit. After deciding retail wasn’t for her, she saw that her
    local animal clinic was hiring. As an avid animal lover and eager to learn, she applied. Since
    2015 she’s still going strong and am always eager to learn something new in the field. She lives
    with her wonderful boyfriend, Ken, his 2 children, 2 dogs, Lilly and Edison, and my 2 cats,
    Cleopatra and Rajah. While they are homebodies, they enjoy hiking, motorcycle rides, and
    anything that involves swimming.

  • Bianey

    Veterinary Assistant

    She is a California native, but was mainly raised in Seattle. School wise interested in starting pre-
    requisites classes to become a veterinarian! She’s strongly passionate towards the medical field

    and working with animals. Her hobbies are hiking with her 4 year old German Shepherd named
    Lily. She also likes to go out to breweries, wine tastings, restaurants, road trips, trail riding,
    spending time with her chickens (12 hens and a rooster!) and traveling to new places.

  • Zoe

    Veterinary Assistant

    Zoe was born and raised in Washington. In high school, she got a job as a vet assistant! She’s always had and worked with animals, starting with horses. She was a competitive Equestrian Vaulter for over a decade!!! The sport grew her passion for animals, along with having her own pets, and she has found her passion in veterinary medicine! Zoe has a standard poodle, Charlie, a horse, Mac, and 3 parakeets. She also enjoys gardening, reading, cooking, vaulting, as well as spending time with her friends and family in her spare time.

  • Canada


    Ironically not Canadian, Canada was born and raised in Washington and spent a few years in California. She loves ice skating on her days off or taking her husky, Sidney, on hiking trails when the weather is nice. She also has a very talkative tuxedo cat, Baby. Canada is an animal portrait artist, so when she’s not working and playing with pets here at Cobblestone Animal Hospital, she’s at home painting them! Canada has been in the veterinary field since 2018 and has loved every minute of it.

  • Angela


    Angela was born and raised in Vancouver, Canada. After meeting her husband in Seattle, she
    moved to Washington State. Together, they have two kids who are both currently attending
    Washington State University.

    Angela and her family rescued their dog (Tilly) in 2018. Tilly looks like a typical black lab, but she
    is actually one-half Newfoundland, with the rest Weimaraner, Portuguese Waterdog, and
    Rhodesian Ridgeback mix.

    In her spare time, Angela enjoys cooking, entertaining people at her home, and spending time
    with friends and family. She believes that feeding your stomach is like feeding your soul. Angela
    also loves to read, hike, camp, travel to warm places, and spoil Tilly.