Specialty & Surgical Services
This could happen to you: your pet has a combination of symptoms, but they all point to different diagnoses, each of which would require a different treatment. Sometimes it's not immediately clear what disease is present in a dog or cat when they become ill (and your dog or cat isn't talking!). Blood tests may suggest one problem, whereas x-rays and ultrasound may suggest others. This is a scenario all veterinarians are familiar with and a situation where Bishop Ranch Veterinary Center & Urgent Care has a number of specialists at our disposal who help handle diagnostically complex and challenging cases.
Whether it is a surgical procedure performed by a board-certified veterinary surgeon, a review of x-rays by a board-certified veterinary radiologist, or web-based consultations with veterinary specialists in private practice and at universities worldwide, Bishop Ranch Veterinary Center & Urgent Care has access to the kind of advanced diagnostic procedures and university-quality specialists often only available at specialty practices or even veterinary schools. The only difference is, at our hospital your pet can stay right here where they are, with people they are familiar with, and at a facility close enough for you to visit as often as you like.
Of course, your pet will probably never need this sort of advanced, collaborative veterinary care. But isn't it good to know it's available if you do?
Surgeons
Dr. Carl Koehler, DVM, DACVS
Board-Certified SurgeonDr. Koehler graduated from the University of California, Davis School of Veterinary Medicine in 1998. He went on to complete a rotating internship at the California Animal Hospital in Los Angeles, followed by a surgical internship at Gulf Coast Veterinary Specialists in Houston, and later a small animal surgical residency. A board-certified surgeon, Dr. Koehler enjoys the challenge of medicine and surgery and is passionate about helping animals live healthier, more comfortable lives.
Outside of the hospital, Dr. Koehler can often be found biking, hiking, or enjoying just about any outdoor activity. He is an active member of the AVMA, VOS, and ACVS.
Dr. Bianca Boudreau, DVM, DACVS
Small Animal Surgery
Dr. Bianca Boudreau grew up in Canada and earned her Doctor of Veterinary Medicine degree from the University of Montreal in 2008. After veterinary school, she moved to Southfield, Michigan, where she completed a one-year rotating internship at BluePearl Veterinary Partners, followed by a one-year surgical internship at the Veterinary Specialty Hospital of San Diego in California. She then completed a three-year small animal surgery residency at Michigan State University, becoming board certified in small animal surgery in 2014. Prior to joining Northern California Veterinary Surgical in 2018, Dr. Boudreau served as an associate professor at Michigan State University and as an associate surgeon at Sage in Dublin.
Dr. Boudreau’s surgical interests include soft tissue, oncologic, and reconstructive surgeries. She is a member of the Society of Veterinary Soft Tissue Surgery and attends their conference annually.
Outside of work, Dr. Boudreau enjoys spending time with her cat, Maya, and her dog, Archibald. She also loves hiking, swimming, reading, exploring the Bay Area, and enjoying a good glass of wine.
Dr. Tim Sellmeyer, DVM, DACVS
Small Animal Surgery
Dr. Timothy Sellmeyer earned his Doctor of Veterinary Medicine degree from the University of Missouri in 2002. Following graduation, he completed a rotating small animal internship at Kansas State University in 2003, and immediately afterward began his surgical residency at Mission MedVet in Mission, Kansas. Upon completing his residency in 2006, Dr. Sellmeyer moved to the San Francisco Bay Area as an associate surgeon with Veterinary Surgical Associates in Concord. He became board certified in small animal surgery in 2007 and subsequently started the Sage, Dublin surgical service in 2008. In 2018, he joined Northern California Veterinary Surgical.
Dr. Sellmeyer’s surgical interests include all orthopedic procedures, with a focus on challenging fracture repairs and joint surgery. He is also experienced in ureteral stent placement and subcutaneous ureteral bypass (SUB) systems. He is an active member of the Veterinary Orthopedic Society and attends their conference yearly.
Originally from Missouri, Dr. Sellmeyer grew up in St. Louis and later Craig, where he attended high school. Outside of work, he enjoys traveling, hiking, brewing beer, and cheering on the Mizzou Tigers, St. Louis Cardinals, and St. Louis Blues.
Cardiology
Dr. Hayley McDonald, BVSc Dip ECVIM-CA, PhD MRCVS
CardiologyDr. McDonald grew up in Auckland, New Zealand, and obtained her veterinary degree from Massey University in 2009. After working as a small animal veterinarian in Australia, she completed a PhD at the University of Queensland. Her PhD focused on pharmacologic modulation of inflammatory and fibrotic pathways in ischemic heart disease to develop novel therapeutic strategies for human patients with coronary heart disease.
Dr McDonald moved to the United Kingdom in 2015 to undertake a Cardiology residency at the University of Glasgow. She completed the European College of Veterinary Internal Medicine (ECVIM) exams and the cardiology specialty boards to become a diplomat (board-certified cardiologist) in the cardiology specialty in 2019. After completing her residency, Dr McDonald stayed on at the University of Glasgow as a Lecturer & clinician in Cardiorespiratory medicine. In 2019 she moved to Dick White Referrals, a sizeable private specialty hospital in Cambridgeshire, England. At this hospital, she was part of the Mitral Valve repair team, one of only a few centers around the globe offering highly specialized valve repair surgery and other cardiac surgery procedures performed under cardiopulmonary bypass.
In 2022, she moved to California and joined the team at LAASER, where she enjoys helping all pets with cardiac disease and hopes to grow the interventional cardiology caseload, having a particular interest in this area. Dr McDonald loves all aspects of veterinary cardiology & advancing this field. She has a specific interest in cardiac imaging. After spending many years throughout her Ph.D. focusing on ultra-high field cardiac MRI for tissue characterization, she ultimately hopes to help translate this knowledge and experience toward helping her canine and feline patients with heart disease. She is the founder of HeartHealth, a veterinary corporation providing medical and preventative care to patients throughout the United States and working to advance veterinary medical research worldwide.
When not in the clinic, you will never find her far from the water; as an avid kite surfer, she spends all her free time in the ocean and loves chasing the waves in California! Dr. McDonald also loves traveling the world and spending time visiting her friends all over the globe. She also loves skiing and hiking, having spent a lot of time in the highlands in Scotland and climbing & skiing mountains in New Zealand.
Cardiac Services
Cardiac assessment
Ongoing support for patient care and case management
Echocardiography
Electrocardiography (ECG)
ECG interpretation
Ambulatory Holter monitoring
Thoracic radiographs
Pre-anesthetic evaluations
Pericardiocentesis
Thoracocentesis
office hours
- Mon-Fri6:30am - 9:00pm
- Sat-Sun7:30am - 6:00pm
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