Dr. Aaron Cohen DVM
Owner, Veterinarian
A native of Jacksonville Florida, Dr. Aaron Cohen’s first pet was a baby chick by the name of “Peep-Peep”, who eventually grew up to be a rooster. After that, he pretty much stuck to just cats and dogs.
Dr. Cohen attended the University of Florida, Gainesville where he studied animal science and psychology. Shortly thereafter, he transferred to Northeastern University in Boston. He completed his Doctor of Veterinary Medicine at Ross University, St. Kitts in the West Indies.
After serving in an internship program at the Massachusetts Society for Prevention of Cruelty to Animals in Springfield, Mass, Dr. Cohen settled in with Porter Square Veterinarians of Somerville for the next seven years. Deciding to start his own practice, Dr. Cohen began an exhaustive search that would bring him from the East Coast to the West Coast.
Dr. Cohen bought Peninsula Animal Hospital in December of 2010. He is active in the American Veterinary Medical Association, California Veterinary Medical Association, and the Monterey Bay Veterinary Medical Association. In his free time, he enjoys hiking, biking and conversing with his cats.
Years in Practice: 33
Education:University of Florida, Northeastern University, Ross University
Email: pahpets@icloud.com
Dr. Johanna Sherrill DVM, MS, Diplomate American College of Zoological Medicine
Associate Veterinarian, Medical Director
Dr. Johanna Sherrill graduated from the University of Georgia with a Degree in Veterinary Medicine in 1995 and a Master’s in Medical Microbiology in 1996. She then completed a general medicine and surgery internship in San Diego, an aquatic internship at Mystic Aquarium in Connecticut, and a residency in zoological medicine at the National Zoo in Washington, DC. Dr. Sherrill became board-certified in zoological medicine in 2005. She has worked as a relief Veterinarian in California for 20 years, treating all animal species even fish. She is passionate about marine conservation and an eco-friendly lifestyle.
Years in Practice: 28
Education: Doctorate Veterinary Medicine, MS-Medical Microbiology, BAS- Stanford University
Interests:Horseback-riding, Water Sports, Singing, Playing the Guitar
Email: pahpets@icloud.com
Jasmine
Client Care / Veterinary Assistant
Jasmine joined our practice in 2013 and has since become our frequent MVP, learning many skills and performing a variety of roles. Her sunny disposition, willingness to help others, and charm with animals endears her to our clients and fellow staff. She strives to bring all she can to PAH, to make all our clients & their pets feel like a top priority. In her free time, Jasmine enjoys reading, art, gaming, time with family, and her cat, Daisy.
Gabi
Veterinary Assistant
With an open mind and compassionate heart, Gabriella joined the fun world of veterinary care in 2018, joining PAH in 2021. Straight out of high school and a mind focused on getting into vet school, she’s always eager to learn how to care for our four legged friends! When she’s not nose deep in a college text book, she’s running with her Rottweiler, snoozing with her Shih-tzu, or trying to cook with her cats who are always watching and ready to catch a bite!
Jeanine
Certified Veterinary Assistant
Jeanine first joined the PAH team in December 2021 as a Central Coast College student extern. Her love for animals started at a young age when the only book she checked out from the library was a book about different animals. That is how she decided a career with animals was in her future. Being at PAH she is excited to see every pet come through the door and will give them the best care that they deserve. Jeanine treats everyone and every pet with compassion and is joy to work with. In her free time you can find Jeanine spending time with her family and frenchie Rocky, reading a book, or playing video games.
Alice
Veterinary Assistant
Alice joined the PAH team in 2025 with experience in handling marine mammals and wildlife in the Amazon. (See Alice feeding a baby sloth in the picture!)
Alice is completing a B.S in Marine Science and is hoping to start vet school in the fall of 2026. While newer to small animal medicine, she is excited to learn anything and everything!
Alice’s owns a feisty kitten named T’Challa who found her on a weekend getaway.
In her free time, Alice loves to read, bake, and hunt for sea glass.
Lucia
Technician Assistant
Lucia is a mom of three children who enjoys gardening and spending time with her family. She loves to take walks and hikes on weekends with them, including at Toro Park, a family favorite.
Lucia has a cat named Stinky who loves to play with the curtains!
Lucia has always loved being around animals and nature. “It makes me feel calm and happy.”
Lucia joined PAH as an assistant in September of 2025. She brings positivity, a smile, and is always there to help her colleagues.