Meet our wonderful Doctor and Staff

  • Dr.
    Diana Stiles

    Dr. Diana Stiles is native to Southern California, having grown up in the nearby San Gabriel Valley. From the age of 9, she knew she wanted to be a veterinarian and passionately pursued her dream. She is a 2001 graduate of Colorado State University, College of Veterinary Medicine and Biomedical Sciences. Upon graduation from Veterinary School in 2001, she returned to Southern California to start her veterinary career. Her main interests include internal medicine and preventative care, and she especially enjoys being in the exam rooms talking with her clients. She is grateful for the many clients who have been with her for years, allowing her to be a special part of their pets' lives from their early years all the way into their senior years. She is excited to open Rancho West Animal Hospital and looks forward to continuing to provide high quality, compassionate care to the pets of the Inland Empire. Dr. Stiles also volunteers her time with a local dog rescue group and is an active member of the American Veterinary Medical Association. Dr. Stiles is married to her high school sweetheart, with whom she has three beautiful children. They also share their home with their 2 dogs, bearded dragon, and guinea pig. In her free time, she enjoys spending time  with her family, camping, water sports, and reading.  

    'Never Let go of your Dreams'  -Unknown

  • Candace Whitman
    Hospital Manager/Registered Veterinary Technician

    Candace is our wonderful skilled Registered Veterinary Technician (RVT) and Office Manager. She has over 20 years experience in the Veterinary field. She is a loving, caring animal advocate and wants the best for all animals. She is married to her high school sweetheart, and they have two beautiful girls together. They also have three pets, two dogs named Benjamin Bear and Bo, and a kitty named Motor. She loves emergency medicine and promoting dental health. She has dedicated her life to providing the best care for all of our patients. When she has free time, she enjoys spending time with her family, gardening, and watching Grey's Anatomy.

    'Until one has loved an animal, A part of ones soul remains unawakened'         -Anatole France

  • Roxanne Aviles
    Assistant Manager/Lead Receptionist

    Roxanne is our assistant manager and lead receptionist. She has been in the veterinary field for 5 years and has a passion not only for animals but to making sure clients are happy too. She is currently attending Mt. Sac pursuing her RVT license. Since she was a little girl she has always had a special bond with animals.. Growing up she has  had a number of family pets, such as dogs, cats and fishes. Currently her and her high school sweetheart own two cats, Ollie and Mollie and a pit bull named Dolce. On her free time she loves to spend time with her other half, her pets and family. 

    ' One Cat just leads to another'   - Earnest Hemingway

  • Melissa Meza
    Veterinary Assistant

    Melissa is one of our sweet, and compassionate Veterinary Assistant. She has just started her career in the veterinary field, she is pursuing her RVT license at MT.SAC. Rancho West Animal Hospital is the first hospital she has worked at and we are so glad that she has spent this last year learning with us, we cant wait to see her grow into an amazing Registered Veterinary Technician. She has two dogs Seven and Bear. Melissa has always had a passion for animals and always dreamed of working with them. In her spare time she loves to spend time with her family, and pets. She enjoys working out, and reading. She is also a skilled singer and ukulele player.

    'Be the change that you wish to see in the world' -Mahatma Gandhi

  • Jordyn Stiles
    Veterinary Assistant/Receptionist

    Jordyn is one of our sweet and caring veterinary assistants. Jordyn aspires to be a Veterinarian and has always loved being around and helping all animals. She has 2 dogs, Jessie and Archie, and a bearded dragon named Loki. In her free time, she swims competitively, plays water polo, and hangs out with friends and family.

    Life doesn't have to be perfect to be wonderful' -Unknown

  • Jessica Romero
    Veterinary Assistant

    Jessica is our newest assistant, she is finishing up school to become a RVT. Rancho West is her first Animal hospital to work at and we are so excited to teach her and see her bloom into a amazing RVT. Jessica has two Dogs Abby and Penny that she treats as her babies. In her free time she loves spending time with her family and friends, and learning all she can to be a great RVT

    'If it doesn't Challenge you it doesn't change you' -Unknown

  • Ben and Jerry West
    Hospital Kitties

    Our Hospital Kitties Ben and Jerry. They are super sweet and each one has their own personality. Ben is a strong willed and curious little guy whose past time is pestering his brother Jerry, eating and taking naps. Jerry is our sweet little shy guy who spends his day snoozing, and eating, he loves to play with his cat toys and when Ben isn't pestering him they have a good time rough housing with each other.

    'Cats can workout mathematically the exact place to sit that will cause the most inconvenience' -Pam Brown


Find us on the map

Rancho West Animal Hospital

8645 Baseline Rd. Rancho Cucamonga,CA 91730 (909) 466-5490

Office Hours

Monday - Friday:

9:00 am - 6:00 pm


9:00 am - 2:00 pm




Read What Our Clients Say

  • ""Best experience! My poor dog had been itching for 5 days relentlessly. One injection and her allergies have been relieved! She is sleeping peacefully tonight! Thank you Dr. Stiles!! You are the Best!!""
    Dawn M
  • ""I could not have asked for a better place. Sadly I had to put down our dog last weekend. The treatment I got and my puppy got was over the top amazing. It's not an easy thing to put your pet down. Having amazing customer service is always a good thing but here they actually care! Thank you from the bottom of my heart for everything!""
    Kerri D
  • ""We found our new fav. Vet!! The first time I met Dr. Stiles I right away had a good feeling she gave my father and I a warm welcome and introduced herself. She took a look at our pregnant female and after examining her she told us the problem and was 100 percent correct. She could have taken advantage of us and gave us the run around but she didn't. She is honest and trustworthy. We had another concern with a puppy and again very honest with her answers and did not try and rip us off or stress out the puppy in any way. I will be telling everyone about Dr. Stiles at rancho vet!!! Thank you for everything you do.""
  • ""I love it here. The doctor is spectacular
    Really nice and professional
    Lovely office""
    Marianne Brenna K.