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  • Dr. Walter Cailleteau


    Dr. Walter Cailleteau was born in Santa Monica, California, and his family moved to Friendswood, Texas when he was four years old. Growing up in suburban Texas, he was exposed to a wide variety of animals. His family pets included the usual assortment of cats and dogs, but they also had horses, chickens and a goat. He also enjoyed the numerous birds, turtles, snakes, lizards and other wild animals that lived in the area. This frequent exposure to the local creatures undoubtedly contributed to his growing interest in helping and healing our non-human friends.

    In 1991, Dr. Cailleteau received a Bachelor of Science degree in Veterinary Science from Texas A&M University and in 1992 he was awarded a Bachelor of Science degree in Biology from the University of Houston. He received his Doctor of Veterinary Medicine degree from Texas A&M University College of Veterinary Medicine in 1994, and was inducted into Phi Zeta, the Veterinary Honor Society that same year.

    Dr. Cailleteau moved to the Los Angeles area in 1994 and completed an internship in small animal medicine and surgery at VCA West Los Angeles Animal Hospital in 1995. From 1995 until 2000 he was Medical Director of VCA Miller Animal Hospital in West Hollywood, California. In the fall of 2000, he moved to the Inland Empire and worked as an associate veterinarian at Terra Vista Animal Hospital in Rancho Cucamonga until October of 2013.

    In November 2013, Dr. Cailleteau purchased Hastings Animal Hospital and changed the name to Sierra Madre Animal Hospital. He is truly looking forward to improving the hospital and serving the clients and pets in the area. When he is not working, Dr. Cailleteau enjoys spending time with his wife Shayani and their dog Tesla. He also likes motorcycling, running, snowboarding and gardening.


    Elena was born in Mission Hills, California. She has been passionate about working with animals since she was young. Elena loves helping any animal in need, and she fosters pets needing a new home. She also enjoys volunteering at the Best Friends Animal Society in Mission Hills.

    In July of 2014, Elena received her Veterinary Assistant Certification from Animal Behavior College in Santa Clarita, California. She is planning to get her Dog Trainer Certification as well. Her next goals are to become a Registered Veterinary Technician (RVT) and then apply to veterinary school to become a practicing veterinarian.

    Elena enjoys the fitness lifestyle and is planning on becoming a personal trainer, because she believes that everyone can benefit from having an active and healthy lifestyle. In her spare time, she enjoys going to the gym, hiking, dancing, going to Dodger games and spending time with her dog Honey and her cat Tom.


    Mary was born in Downey, California and she grew up in Arcadia. She has been a veterinary receptionist for over 4 years. When she was young she helped her father with filing and other tasks at his veterinary hospital in Rosemead, California.

    Mary is a licensed cosmetologist in the state of California and she is currently enrolled at Citrus College in Glendora, working towards transferring to a university for a Bachelor of Science degree in Business Marketing. In her spare time, she enjoys frequent trips to Disneyland, spending time with her two cats, Ron and Tonks, and watching football and baseball.


    Cheney was born in Pasadena, California and grew up in Hastings Ranch before moving to Glendora in 1993. After graduating with honors from Glendora High School, she attended Citrus College and Santa Barbara City College.

    Since she was a little girl, Cheney has been passionate about helping animals. She started working in the veterinary field in 2007 at Dr. Domotor’s Animal House in Monrovia as an Animal Care Specialist, and in 2014 joined Dr. Cailleteau’s team and has worked her way up to becoming a veterinary technician, as well as a receptionist. She plans to go back to school to become a Registered Veterinary Technician.

    In her spare time, Cheney enjoys rescuing and nursing all kinds of orphaned baby animals back to health, including puppies, kittens, squirrels and even some wild newborn mice! She also enjoys horseback riding, swimming, and spending time with her dog, Pugsly, and seven rescue cats, Ben, Elliot, Olive, Riley, Jax, Patrick and Jenner.


    Denise has been a veterinary receptionist for over 10 years. She was born and raised in Los Angeles. Ever since she was a young girl she knew she wanted to work at an animal hospital. As a teenager she volunteered at the local Humane Society. She really enjoys helping the clients and their four-legged family members.

    In her free time, Denise enjoys spending time with her husband, her two daughters, her three dogs, Phineas, Ferb and Dookie, her two cats, Ariel and Sebastian, and her Chameleon, Marshmallow.