Evelyn Sagastume, DVM

Founder and Owner

Litton/Hearst and Vince Patin (Photographer)

Dr. Evelyn Sagastume is the founder and owner of Petsadena Animal Hospital. She was raised in Southern California but left for a time to study at the University of California, Davis, where she graduated with a Bachelor’s in Animal Science & Management. She went on to receive her Doctorate in Veterinary Medicine from the same institution. Her follow up training to veterinary school includes a year-long internship in small animal surgery and medicine, which she performed at Advanced Veterinary Care Center in Lawndale, CA.

In May 2014, Dr. Evelyn purchased an existing hospital and has worked hard on changing the practice to offer personalized care to the pets in her community. Today, clients enjoy a family-friendly practice that includes cutting-edge technology, a passionate medical team, and some of Southern California’s best doctors who are committed to the health and happiness of their patients.

In addition to a strong passion for preventive medicine and client education for her patients and their families, Dr. Evelyn has a longstanding interest in internal medicine, specifically the diagnosis and management of endocrine diseases like diabetes.

She also prides herself on being a practice owner who can shape her practice to provide progressive care and educational content to her clients in order to help her patients maintain a long and healthy life. She is passionate about ensuring clients have the information they need to be the best pet parents possible.

When she’s not at the hospital, Dr. Evelyn is an active member of multiple state and local veterinary medical associations. She is currently a member of the House of Delegates for the California Veterinary Medical Association. In her free time, she enjoys traveling around the world, participating in multiple outdoor activities, and playing the piano. She is also the proud pet parent of a very spoiled kitty named Mango, who you can catch up with every Monday on Petsadena’s Instagram page.


Eileen Reyna, DVM

Born and raised in Southern California, Dr. Eileen Reyna left her career in the fashion industry to pursue veterinary medicine – her true passion.

In preparation for entrance to veterinary school, she attended Pasadena City College and Cal Poly Pomona. In 2013, she earned her doctorate in Veterinary Medicine from Western University of Health Sciences. Since then, she has gained experience and knowledge working in Small Animal Practice for the past seven years.

Her professional interests range from dermatology, internal medicine, and preventative care, though her favorite part about veterinary medicine is educating and collaborating with pet parents in an effort to provide the best care possible for their furry family members.

In her leisure time, Dr. Reyna enjoys camping, hiking, and spending time with her family and 5 dogs – Abbie, Mochi, Taco, Bella, and Pugsley.


Jennifer Gabriele, DVM

Dr. Jennifer Gabriele, a 2001 graduate from Ross University School of Veterinary Medicine, hails from Queens, New York City, and practiced for 16 years in Manhattan, before moving to Los Angeles with her husband, in 2016. During that time she has worked at small animal practices in Los Angeles, and Manhattan Beach, as well as taking on relief shifts with the ASPCA, and SNPLA for community outreach.

In addition to small animal medicine, and discussing with pet owners preventative care for their pets, Doctor Gabriele enjoys soft tissue surgery, has an interest in continuing training in advanced surgery, acupuncture, animal behavior, and nutrition. In her spare time, Dr. Gabriele enjoys hiking and cooking vegan meals and sweets with her husband. She also enjoys gardening, bike riding, art, writing, and jewelry making. At home, Dr. Gabriele cares for her 16-year-old cat, Oedipus, and conure Ivy, and most of all spending time with her son, Felix. She loves showing him how wonderful all types of pets can be, and how to respect and enjoy all the things a pet, and nature in general, can offer to us.

Dr. Gabriele hopes to bring a positive work ethic, and accessible, loving, experienced care to patients, in addition to an already dynamic medical team at Petsadena. She considers becoming a full-time member of the Petsadena team, an honor and great opportunity, and is looking forward to meeting clients and their wonderful pets, soon!


Dana Muwanas, DVM

Since she was a child, Dr. Dana Muwanas has always known she wanted to work with animals. She was raised around animals all her life, from farm animals on her family’s farm to small animals in her own house, and caring for animals has always come naturally to her.

However, the defining moment in Dr. Muwanas’ life that led her toward the veterinary field happened when she was just 10 years old when her family dog suddenly became ill and had to be rushed to the veterinarian. As her family stopped at a very small animal clinic, a veterinarian came out and took her dog in. Dr. Muwanas remembers watching as this veterinarian took care of her dog with great compassion and care. “I realized at that moment that I wanted to help save animals’ lives through medicine.” Dr. Muwanas says.

At 16 years old Dr. Muwanas started volunteering and later working at a small animal hospital in her local area. There she was mentored and able to work alongside great veterinarians that provided excellent care for animals. She got to learn the medical aspect from many different veterinarians as well as interact with clients and their animals, which she loved. She later pursued her undergraduate degree in biology and went on to be accepted into Western University Veterinary School where she gained her veterinary degree.

Being a pet parent herself, Dr. Muwanas knows how stressful and heartbreaking it can be when a pet is not feeling well. For this reason, she prides herself in always going above and beyond to treat her patients as if they were her own.

Dr. Muwanas has a special interest in internal medicine and surgery. She also enjoys teaching clients about their pets’ conditions and providing them with the best treatment options available.

She has a beautiful and energetic German Shepherd named Lexa that loves people and treats, and her hobbies outside of work include going to church, playing basketball, trying new food, and spending time with friends and family.