Jacqueline Sehn, DVM, CVH, VetMFHom




Jacqueline Sehn, DVM, VetMFHom, was born and raised in Brazil, where she attended Veterinary School at the Federal University of Rio Grande do Sul, having graduated in 1983. After working for a few years in a mixed animal practice, she traveled to Europe to further her studies in Homeopathy.

She moved to NYC in 1987 and has lived and practiced veterinary medicine on Mercer Island, east of Seattle, since 1996. Her life's passion has always been to heal our dog and cat friends.  She keeps current with state of the art orthodox veterinary techniques, as well as alternative treatment modalities of homeopathy, chiropractic and nutrition/nutraceuticals.

Dr. Sehn is a member of the following associations:

  • American Veterinary Medical Association (AVMA)
  • Washington State Veterinary Medical Association (WSVMA)
  • American Holistic Veterinary Medical Association (AHVMA)
  • Washington State Holistic Veterinary Medical Association (WSHVMA) (co-founder)
  • Academy of Veterinary Homeopathy (AVH) - Past President, Certified (CVH)
  • American Veterinary Chiropractic Association (AVCA) - Certified (CVC)
  • International Association for Veterinary Homeopathy (IAVH) American representative (2001-2007)

Dr Sehn has recently changed her name back to her maiden name. You may know her as Dr. Jackie Obando. 

Lisa Brienen, DVM


I have always loved and been interested in all kinds of animals since I was a young child. My family traveled too much to have more than hermit crabs and fish for pets but I attempted to make up for this lack by visiting zoos all over the world. Originally my plan was to be a zoo veterinarian and be involved in the preservation of endangered species. After a few years working in and experiencing externships in zoos (Zoo Negara Malaysia, Toronto International Zoo, Sacramento Zoo) I realized that zoo life was a bit too dangerous for me so I started searching for a form of veterinary medicine that fitted my interests and beliefs. When I discovered Dr. Richard Pitcairn's Basic Homeopathy Course for Veterinarians it was the beginning of my journey in healing.

Dr. Brienen's credentials:

  • Doctorate of Veterinary Medicine, Washington State University 1992
  • Basic Course in Veterinary Homeopathy (Academy of Veterinary Homeopathy) 1996-97
  • Advanced Course in Veterinary Homeopathy in 1998
  • Teacher and Mentor Dr. Richard Pitcairn
  • Certified Veterinary Homeopath 2002
  • Academy of Veterinary Homeopathy Board Member
  • AVH Journal Chair and contributor
  • AVH President Elect

Dr. Brienen is a member of the following professional associations:

  • Academy of Veterinary Homeopathy
  • American Veterinary Medical Association
  • King County chapter of the Holistic Veterinary Medical Association
  • American Holistic Veterinary Medical Association
  • Washington State Veterinary Medical Association

I enjoy spending time with my family: husband, Paul and sons, Jackson (9yrs) and Samuel (12 yrs) and my lovely new kitten, Delicia! I also enjoy gardening, traveling, writing, reading mystery novels and baking.

Marta Nobrega, DVM


Although born in California, Dr. Nobrega was raised in Rio de Janeiro, Brazil. A 1994 graduate of Federal University of Vicosa, Minas Gerais, Brazil, she opened her own practice in Porto Seguro in 1995. Following a move to Seattle in 1998, she worked at the Aerowood Animal Hospital in Eastgate for nine years performing surgeries, dentals, emergency care and traditional veterinary treatments.

Dr. Nobrega is a certified member of the International Veterinary Acupuncture Society. She lives in Bellevue with her wonderful husband and her son. Her interests include hiking, white-water rafting and yoga.

Dr. Nobrega is a member of the following professional associations:

  • American Veterinary Medical Association
  • Seattle-King Country Veterinary Medical Association
  • Washington State Veterinary Medical Association
  • International Veterinary Acupuncture Society
  • American Veterinary Acupuncture Association
  • Washington State Holistic Veterinary Medical Association

Heidi Miller, Receptionist/Assistant


My name is Heidi and I was born and raised in the Seattle area. I have worked in the veterinary field for over ten years and have been fascinated with it every step of the way. I have always marveled at our pets' abilities to make our lives better and more fulfilling through their healing presence. I enjoy spending time with my husband of over 30 years, Ken, and our two terrific children, Kendra and Andrew. On my time off, I love to cook, garden, attend wine tastings and travel to Mexico (I am half Mexican after all!). I stay fit with my German Shorthaired Pointer, Revel, and my Cocker Spaniel, Dolly Mae. I am so excited to be working here at Mercyvet and have enjoyed engrossing myself in the fascinating world of holistic medicine.

Sandy Gaston, Surgical Recovery


It's great being back at MercyVet. I worked with Dr.Sehn in the very beginning, the first year. At that time I did a little of everything at the clinic, as we all did. While I was working there I was also doing my own healing work as a behaviorist-using various forms of energy work. After the clinic got going it was time for me to go back to taking care of myself and my clients.


This time I will be recovering surgical and dental patients using energy work, flower essences and Acutonics. The Acutonics healing system is a needle-less, non-invasive treatment that is similar to acupuncture. Precision calibrated tuning forks are applied to the specific acupuncture and acupressure points that access the body's meridians and chakra energy systems. This stimulates and balances the body's subtle energy field to promote healing and inner harmony. So when you have a companion animal that is having an anesthetic procedure at MercyVet, I will be there to help balance them before the procedure (I like them to hear my voice and see me and feel who I am before they have their work done). And when they are brought to me after their procedure I will be holding them and talking to them softly, helping them feel safe when they wake up. I will use all of my many years of training in energy modalities to help them recover to the fullest. I look forward to working with each animal as an individual-- a precious, one-of-a-kind jewel. What I do with one I may not do with another because each being needs something different in their recovery process. If you would like to learn more about my energy work and meet my animal family, please visit my website at www.animalnature.com.

Daisy Whitley, Office Manager

When you love what you have,   you have everything you need!

When you love what you have, you have everything you need!

Daisy has always had a heart bursting with love for animals! She is a mother to two beautiful dogs Adrienne and Kuni, who have captured her heart, and exponentially enriched her life; 
When she isn't adventuring around the PNW with her fur-children, Daisy is MercyVet's Office Manager! 
Daisy loves working and interacting with the staff, patients and clients of MercyVet - helping to create a warm, welcome, and healing environment for those in need.

She is a strong proponent of animal rescues, and is passionate about the benefits of holistic medicine for all living creatures. One story of which is very close to her heart: Rocky, her 14 year old, forever-puppy pitbull. His final years were full of love (he made everyone's day brighter just by seeing him!) and low on pain; truly a testament to the health benefits of acupuncture, homeopathic remedies, and chiropractic work!

You'll see her at the clinic with the newest addition to her fur-family, Adrienne! She's a rescue pup who has proudly displayed the defining traits of a pitbull: A sweet little wigglebutt, with boundless energy! ...Until she gets cuddled up with you, then it's nap time! 

Rebecca Del Pilar, Lead Receptionist 

Becca is native born Washingtonian. She graduated Tahoma High School in 2012 and since has studied in the fields of Culinary Arts, Automotive Technology, Dance & Entrepreneurship before coming to the world of animals and medicine.

Overall customer service has been my forte in the career world, but I’ve always had a soft spot and place in my heart for animals. Since starting at MercyVet in in fall of 2015, I’ve gained a wealth of knowledge not only in the holistic approach, but the medical field entirely. Here it feels more of a gigantic family, rather than your day-to-day business, which creates an atmosphere of kindness, warmth and even courage in our team at the clinic. I am forever grateful for finding this “diamond in the rough” path, not just for a job, but for my spoiled 4 legged fur family Sonny & Daphne.

When not at the clinic, Becca is usually working on her cars, at the dance studio, reenacting “Chopped” in her kitchen or off on an adventure in this thing we call ‘Life’.

D'Mari Sughrim, Lead Veterinary Technician

Until one has loved an animal, a part of one’s soul remains unawakened.

Until one has loved an animal, a part of one’s soul remains unawakened.

I joined the Mercy Vet team in the fall of 2015 as a veterinary technician to contribute to the health and well being of animals. I gravitated towards Mercy Vet to follow my passion working with animals in natural medicine and to gain knowledge in holistic medicine.

I attended Pima Medical Institute of Seattle for veterinary technician and veterinary assistant training and earned an Associate of Applied Science degree. I graduated as a licensed veterinary technician.

My passion for working with animals has leaded me to an opportunity to volunteer annually with Isla Holbox Spay and Neuter Clinic and Refugio Animal Holbox. I am able to utilize my skills to help reduce the overpopulation of stray animals in rural areas in Mexico.

I live in a beautiful home with my boyfriend Thomas who is a talented audio engineer, our two dogs, and cat. Nala is a sweet and spicy 7 yr old Chihuahua mix, Cooper is a benign and bashful 12 yr old Shetland Sheepdog, and Milly (AKA Mildred when she’s misbehaving) is a pretty and peculiar 10 yr old ragdoll cat.

In my free time I enjoy running, practicing yoga, and snowboarding. When I am not doing one of these activities Thomas and I are on an adventure exploring the world.

Health is happiness, Namaste.

Juliana Mendes, Veterinary Technician


Juliana was born and raised in Bahia, Brazil and graduated from the School of Veterinary Medicine at Santa Cruz State University in 2008. In 2009 (while visiting family in the US) her sister-in-law, Dr. Marta Nobrega, first introduced her to Integrative Medicine.

During her visits to the US, she frequently volunteered at MercyVet, and officially became part of the MercyVet family upon moving to Seattle. She loves being around animals and is especially crazy about cats!

Larkin Harrington, Vet Technician

Hi! My name is Larkin! I was born outside of San Antonio, Texas and from there moved all over the western side of the United States to finally find my home in the Pacific Northwest. Upon finishing high school I lived and studied for a year in Kumamoto, Japan and returned to study Primatology at Central Washington University, Ellensburg. There I worked as a caregiver and conversation partner for three Chimpanzees (Tatu, Loulis and Dar) while working towards completing my degree in Primate Behavior and Ecology. I hope to one day work with chimpanzees and other large-bodied apes in the field.

Since I was very young I have always known that I wanted to work with animals in some capacity. Throughout all of my experiences – professional, educational and otherwise – I have come to understand the importance of our connections with animals and how valuable our relationships with them can be. I am very excited to be working at MercyVet, as it is a small clinic dedicated to quality care and a feeling of family and community.

I enjoy spending time with my family, friends, my rescue fur-baby Bear and his cat brothers Banzai, Fox and Pan. 






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