Our Veterinary TeamSeven Hills Veterinary Hospital

Subash Kethavath, DVM

Dr. Subash Kethavath was born and raised in India and earned his doctorate in veterinary medicine. After his veterinary studies, he volunteered at world veterinary services, where he gained surgical experience. He spent a year working as a Veterinarian assistant surgeon. After practicing he became interested in graduate studies then pursued a master’s at the University of Wisconsin, Madison. This academic pursuit set the stage for a transition into a scientific role in Nebraska.

Passionate about animal care, Dr. Kethavath undertook the Veterinary licensing exam in North America, setting the stage for a fulfilling career. Currently based at the Seven Hills Veterinary Hospital in San Francisco, California.

He sees veterinary care as similar to pediatrics, emphasizing the importance of nurturing, preventive measures, and fostering the well-being of his furry patients. Beyond the clinic, Dr. Kethavath finds joy in the simplicity of life, enjoying hiking adventures, cooking, and cherishing moments with family and friends. He believes in humanity and extends his passion for helping others not only to his patients but also to the people around him.”

MADELINE BENJAMIN, DVM

Dr. Madeline Benjamin grew up in Chicago and always has had a love for animals and a fascination with science. After obtaining her Bachelor’s Degree in Biology from the University of Iowa, she continued her education at the University of Illinois, where she received her Doctorate in Veterinary Medicine. During her veterinary studies, Dr. Benjamin spent two years volunteering at the UIUC Wildlife Medical Clinic, where she gained experience working with various wild species.

Dr. Benjamin greatly values the human-animal bond and enjoys partnering with owners to create care plans for their beloved pets. She also is Fear Free certified and strives to make a positive patient experience with each visit.

When not practicing veterinary medicine, she enjoys hiking, traveling, trying new restaurants, and spending time with her bearded dragon, Lady.

ALVIN HONG, DVM

Dr. Alvin Hong is a Los Angeles, CA native; growing up, his dad would frequently come home with new animals for them to raise and care for. He graduated from Cal State Fullerton with a degree in Sociology and worked in the online gaming industry for several years before attending veterinary school. Dr. Hong graduated from Kansas State University in 2018 with a Doctorate in Veterinary Medicine and returned to California shortly after, where he began practicing in Ventura County. He joined Seven Hills Veterinary Hospital in early 2022. Dr. Hong enjoys fishing, hiking, and honing his musical skills in his free time.

Yuki Okada, DVM, PhD, CVA, DACVIM (Nutrition), Board-Certified Veterinary Nutritionist®

Dr. Yuki Okada, originally from Japan and raised in the San Francisco Bay Area. She earned her BA from UC Berkeley and her DVM from Michigan State University. After more than a decade of clinical practice in Western and Eastern Medicine, Dr. Okada pursued further academic endeavors, obtaining her PhD in veterinary biochemistry from Nippon Veterinary and Life Science University in Tokyo, where she also served as an assistant professor.

Returning to California, Dr. Okada joined Seven Hills Veterinary Hospital as a veterinarian/co-owner. Concurrently, she pursued an American College of Veterinary Internal Medicine (ACVIM) residency in Nutrition, jointly supported by Veterinary Nutrition Specialty Service, Pet Emergency and Specialty Center of Marin, and Balance IT®, earning Diplomate status with the ACVIM as a Board-Certified Veterinary Nutritionist® in 2023. Her resident research garnered the prestigious 2022 Waltham Award at the American Academy of Veterinary Nutrition Clinical Nutrition & Research Symposium.

Dr. Okada’s scholarly contributions span several peer-reviewed scientific journals and textbooks, including her recent co-authorship of a chapter in Advances In Small Animal Care titled “Nutrition for the Hospitalized Patient and the Importance of Nutritional Assessment in Critical Care.”

Outside of her professional endeavors, Dr. Okada delights in exploring diverse cuisines, staying active, traveling internationally, and sharing cuddles with her cherished 18-year-old rescue cat, Monchichi.

ALAN TOMKINS, DVM

Dr. Alan D. Tomkins-Raney has been practicing companion animal medicine for over 23 years in the Pacific Northwest and the San Francisco Bay Area after earning his DVM from Washington State University in 1992. His breadth of expertise includes all aspects of general practice and the acute needs of pediatric and geriatric animal patients. He has worked mostly in private practice, but he also spent three years in shelter and wildlife rehabilitation medicine, where he worked with exotic species. In addition to being a skilled veterinarian, he has taught biology, natural sciences, and biotechnology classes in Bay Area schools. He is a current member of the Lesbian and Gay Veterinary Medical Association, SFVMA, CVMA, & AVMA. When not practicing veterinary medicine, he enjoys spending time with his family: husband Jim, dogs Mackenzie and Gretchen, and cockatoo Lily.

SUN YU, DVM

I come from a very diverse background. I was born in South Korea, and raised in Canada, where I finished my Bachelor’s degree in Cellular Biology and Genetics at the University of British Columbia, then went to the University of Melbourne in Australia to obtain my DVM degree, now living in the States married to a Chinese family! I have a broad understanding of different cultures of people and animals and would love to share my experience and stories. I have a nine-year-old daughter with whom I share the same compassionate love for cats and a three-year-old son whom I am trying to bring up tri-lingual but inventing his language. I also have two dogs and a cat who enrich my family life. I am particularly interested in acupuncture and want to eventually practice a well-balanced western and eastern medicine. I enjoy all winter sports, traveling, and finding a little hole-in-the-wall place to eat.

RAVI TOLWANI, DVM & PHD

Dr. Ravi Tolwani is an advisor on precision cancer care and longevity care. He has held faculty positions at Stanford University and Rockefeller University and has published in peer-reviewed scientific journals. He is passionate about advancing and innovating veterinary medical care. He has personally incorporated molecular approaches to extending lifespan utilizing the best approaches supported by science. He enjoys spending time on the outdoors trail, running, hiking with the family, and watching their two parakeets, Matcha and Poko, and two cockatiels, Palley and Noe, fly around the house.

Dr. Tolwani completed his DVM from Auburn University, a Ph.D. in molecular and cellular biology from the University of Alabama at Birmingham, and an MSc degree from Stanford University Graduate School of Business.

https://www.linkedin.com/in/ravitolwani/