Lead Veterinarian – Christina Riffle-Yokoi, DVM
Dr. Christina Yokoi grew up in the Gold River suburb of Sacramento, CA, and knew from a very young age that she wanted to become a veterinarian. She temporarily relocated to Southern California to attend the University of California, Irvine and earned her Bachelor of Science Degree in Biological Sciences in 2010. After completing her undergraduate studies, Dr. Yokoi attended the University of California, Davis School of Veterinary Medicine and graduated with her veterinary medical degree in 2014. After graduation, she moved back to the Sacramento area to be closer to family and has been working locally as a small animal practitioner since then. Dr. Yokoi has a special interest in senior pet care with the goal of keeping them as healthy, happy and comfortable as possible during their golden years.
Outside of veterinary medicine, Dr. Yokoi spends most of her time with her exuberant Rat Terrier mix named Rufio and her husband Danny. Her hobbies include playing soccer, bingo and pickleball, traveling and enjoying good food.
Veterinarian – Haley Collins, DVM
Dr. Haley Collins is a Northern California native who obtained her undergraduate degree from University of California, Santa Barbara in Molecular Biology. She then obtained her Doctor of Veterinary Medicine degree from University of California, Davis in 2017. Following graduation from veterinary school, she furthered her education and training with an emergency focused internship at Pet Emergency and Specialty Center in San Diego, CA. Finally ending up back in Northern California, Dr. Collins made roots in Sacramento with her family. Prior to being one of the founding veterinarians at Animal ONE, she worked as an Emergency Veterinarian at a local specialty hospital for six years, gaining invaluable experience caring for and treating sick and injured pets.
When not at work, Dr. Collins is always outside adventuring with her husband and son. She enjoys hiking, running, traveling, and anything outdoors or on the water. Also joining in the adventures are the four-legged members of her family — the goofball dogs (Moose and Dyno) and the sassy cat (Small Cat). Dr. Collins is eager to meet your four-legged family members and dedicate her broad experience to caring for your pet and welcoming them to Animal ONE.
Veterinarian – Caitlin Diggs, DVM
Dr. Caitlin Diggs is originally from the San Francisco Bay area but has lived in the Sacramento region for the past six years. She received her bachelor’s degree in Animal Science from University of California, Davis in 2015. She then attended Kansas State University College of Veterinary Medicine and obtained her DVM degree in 2019. She then completed a one year medical and surgical internship at VCA Loomis Basin. Dr. Diggs’ professional interests include preventative medicine, disease management and urgent care. She enjoys creating a relationship with your pets and family and working to strengthen the human-animal bond.
Outside of work, Dr. Diggs and her husband keep busy with their son. Dr. Diggs also enjoys spending time outside and trying different coffee shops. She has two dogs; a Great Pyrenees mix named Freckles and a scruffy tri-color mix named Finley. Dr. Diggs is looking forward to providing exceptional medical care to your pets and advancing the veterinary profession through our employee-owned hospital.
Veterinarian – Emily Nomann, DVM
Dr. Emily Nomann is originally from sunny Southern California but made the move north to obtain her undergraduate and veterinary degrees from the University of California, Davis. Following graduation from veterinary school, she completed a small animal rotating internship in Sonoma County where she furthered her knowledge in emergency medicine, surgery, oncology, and internal medicine. Dr. Nomann and her wife then relocated to the Sacramento area, where she has worked in a general practice/urgent care setting for the last several years.
When she’s not caring for her patients, Dr. Nomann enjoys spending time with her wife and their baby girl, June! They have a dog named Boo Boo and two cats, Peter and Dumpster. You can find them hanging by the pool, watching birds, and frequently traveling to see friends and family.
Dr. Nomann is beyond excited to meet you and your pets and welcome you to Animal ONE!
