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  • Dr. Walter Cailleteau


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    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.


    Marni Brown, RVT


    Marni Brown has worked in the veterinary medical field for more than 19 years. She started as a receptionist in Marin County, California. She worked her way up from veterinary assistant, office manager and finally to veterinary technician. She has technical experience in all aspects of veterinary medicine, with a special interest in veterinary dentistry.

    After graduating from the Professional Veterinary Assistants School in 2007, she passed the veterinary medical exams for the state of California to earn her license as a Registered Veterinary Technician (RVT). From 2000-2003 she worked at this hospital when it was Hastings Animal Hospital. In 2004, she joined Dr. Charles Strange’s team in Glendora, California. Under Dr. Strange’s mentorship, Marni was able to learn and expand her skills in advanced veterinary dentistry.

    In her spare time, Marni volunteers with the veterans at the American Legion in Pasadena. She has a big heart and enjoys working with all the pets, as her own dog, Storm, her three cats, Neeco, Blackjack, and Dizzy, and her turtle will attest.


    Elena Carrillo


    Elena Carrillo 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 Pavlik


    Mary Pavlik 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.


    Matthew Risher


    Matthew Risher was born in Washington D.C., but he grew up in Monrovia, California. He has worked in the veterinary field for five years. While volunteering at the Glendale Humane Society, he was encouraged to pursue a career working with animals. Matthew studied veterinary technology at Mt. San Antonio College and plans to become a Registered Veterinary Technician (RVT).

    When growing up, Matthew would house-sit for family friends and look after their pets. His family always had cats around the house and he has been passionate about animals his whole life. Matthew also works for a grooming and boarding business in Pasadena where he helps look after a large number of dogs. In his spare time, Matthew enjoys reading, movies, music and watching football with his two cats at home.


    Denise Yan


    Denise Yan 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