Owner/Veterinarian Dr. Karlton Pfann was born and raised in Ithaca, New York. He graduated from Cornell University in 1989 with a Bachelor of Science degree. After working for a few years in biotechnology, he attended the UC Davis School of Veterinary Medicine. He has been practicing small animal veterinary medicine here in beautiful Sonoma County since graduating in 1998, and he has a well-known passion for exotic mammal medicine. Dr. Pfann and his wife, Michelle (who grew up in Forestville), have two children, Kieran and Colton. Their household also includes six cats - Ping, Amy, Edwin, Boba, and Baby Two-Thirds. During his downtime, Dr. Pfann enjoys distance running and playing the ukulele and electric bass. Veterinarian Dr. Castro is a 1994 graduate of the UC Davis School of Veterinary Medicine. After years of relief work throughout Sonoma County, we were lucky to be the hospital where she landed. She has been a supportive, constant presence over the last couple of years and a vital addition to our staff. Dr. Castro has a strong love for caring for senior cats and has a special place in her heart for her rescue pups at home. The joys of her life are her two beautiful children, Hallie and Carl. Amanda lives in Guerneville with numerous plant friends. She attended UC Davis and graduated with a degree in Animal Science in 2009. At home, she has three kitties, Penelope, Bonzai, and a little senior chihuahua, Dottie. Amanda is a friendly face who is always willing to help! Erin was a young Petaluma transplant and did most of her growing up here. We first met her when she started volunteering with us in 2000 at age 15, was hired in 2004, and has been with us ever since. At home, she has a gaggle of cats that includes Nell, Miki, Tyrone, Tanzi, Charlotte, B-Dubs, oh, and her husband. She can often be seen volunteering or reading in her free time. Nikita grew up in Petaluma and has been employed here at Brandner Veterinary Hospital since 2008. In January of 2014, she passed the state boards to become a Registered Veterinary Technician (RVT). At home, she has two lovely kitties, Marlo and Marshmallow, and a rambunctious pup named Bean! Brittany is back! She has returned to us after years of both college and working in child welfare. She is working as our technician assistant with our treatment team. We are so thankful for her saving us during the pandemic. It is so nice to have someone so compassionate, hardworking, and beloved in the Brandner house again. She has three kitties, Iris, Gidget, and Linus, as well as her tarantula, Sigourney Weaver. Her interests include camping and plants! Betsy recently joined our front staff team, and she has already been a shining addition. With experience in dog training, she’s a lifelong dog lover who has also become a proud converted cat lover. She enjoys reading and collecting books, soaking in sunny days, and getting out on hiking trails whenever she can. She’s currently hoping to find a four-legged hiking buddy—though for now she shares her home (and her heart!) with Elijah, her niece’s cat, whom she lovingly helps care for. Bio coming soon! Bio coming soon!Our Doctors
Dr. Karlton H. Pfann
Dr. Anne Castro
Our Staff
Amanda: Practice Manager
Erin: Treatment Manager
Nikita: Registered Veterinary Technician
Brittany: Veterinary Assistant
Betsy: Receptionist - Hablo Español
Andy: Receptionist
Wendy: Kennel Attendant - Hablo Español
