Practice Support


Ryan DesJardins


Ryan is a co-owner and Dr. Mesher's husband.  He provides business, technical and support services for the practice. You may also occasionally hear him answer our phones.  He works full-time as a manager at the City of Portland, Bureau of Emergency Communications (911).


He’s an avid animal lover (it’s sort of a requirement when you are married to a vet), who grew up on a farm in southeastern Washington.  After serving in the Marine Corps, attending college and working in southeastern Washington, he moved to Portland in 2001 and met Dr. Mesher while she was an emergency vet at Dove Lewis.  They were married in 2005.


Ryan is a proud alumnus of Washington State University (#GoCougs) - sorry UO/OSU fans!


Ryan is also an accomplished photographer, and his prints are available for purchase on his website




From your first contact with us, our entire team is dedicated in assisting you and your pet(s).  Each one of our doctors, technicians and support staff are dedicated to our mission of improving the comfort and quality of life for pets and their people!


Louise Mesher, DVM, CCRT


Dr. Mesher was born and raised in Newfoundland, Canada. She lived in British Columbia for a while and it was here she realized the PNW rocks! After veterinary school in Prince Edward Island, Canada at the Atlantic Veterinary College, she loaded up her dogs and textbooks and moved to Washington state in 1999.


Louise has worked at a variety of practices - a mixed animal practice, a cat clinic, a cat shelter, and as a staff veterinarian at Dove Lewis Emergency Animal Hospital in Portland.  It wasn’t until she took a job with a mobile practice in 2005 that she finally found her forever style of practice. Since then, she has worked with the certainty that this is how veterinary medicine “should be”. Most animals and people are more comfortable at home!


In 2008, Louise started At Home Veterinary Services with a mission to provide in-home veterinary care for dogs and cats….especially senior pets who are often underserved in traditional veterinary clinics. All animals, regardless of age or mobility, deserve exceptional care and thoughtful treatment plans.


Louise has a passion for helping pet guardians improve their animals’ quality of life. There is nothing more satisfying, she believes, than giving a geriatric pet a new lease on life. She has continually worked towards learning new ways to relieve pain, restore function and provide comfort.  She has trained in acupuncture and in rehabilitation (like physical therapy) in order to bring more options to her patients. Currently, she is working towards a certification as a veterinary pain practitioner and is excited to have new skills to improve patient comfort.


In addition to feeling very fortunate to have a career and co-workers that she loves, Louise loves gardening and planning for an edible landscape at the rural property she shares with her husband, Ryan, preteen daughter, Emmie, and an array of misfit pets

Heather B. Dillon, DVM


After graduating from Texas A&M University in 1996, Dr. Dillon spent a year completing an internship on Prince Edward Island at Atlantic Veterinary College. (It was here that Drs. Mesher and Dillon met and became friends.)


Dr. Dillon moved to Portland in 1997 and practiced medicine primarily at two Clinics: Wilsonville Veterinary Clinic and, most recently, North Portland Veterinary Hospital. She also spent a couple of years doing relief work at numerous clinics around the metro area.


Dr. Dillon loves the relationships that can develop between the veterinarian and her clients and patients. “In a house call it is even more profound”, she says. “Clients have my undivided attention and I can get a much deeper understanding of what is happening for the pet.”


Assuring that animals have the most comfortable medical experience possible is a goal to which Dr. Dillon is ardently devoted. Her Portland home is shared with her husband, young son and a very large Manx cat

Tisha Posey, DVM, CCRT


Tisha Posey grew up in Oklahoma and earned her Doctorate of Veterinary Medicine in 2008 from Oklahoma State College of Veterinary Medicine.


Although she is a born and raised “Okie” she has always felt drawn to the Pacific Northwest.  After working in Tulsa, Oklahoma in a traditional practice 5 years she and her husband decided it was time to fulfill their dreams so started planning a move to Portland.  As fate would have it, At Home Veterinary Services was looking for a new hire at that time.


Dr. Posey finds fulfillment from building genuine and meaningful long-term relationships with clients and patients and home visits seem like the most natural way to achieve this. “To be able to build this relationship in a comfortable home environment just feels right to me.” Tisha says,  "My pets are my best friends, and I think our pets should be treated as such," she says. “Being in the home allows me to treat other animals like I would my own pets, providing them with care in an unhurried and minimally stressful manner.”


At home, Dr. Posey cares for her cat Seniõr Chavez, and her dogs, Perrin, and Apollo. She is married to her high school sweetheart, Chris.  In her free time, she enjoys all that the Pacific Northwest has to offer but most of all being out in nature with Chris and the dogs while enjoying an Oregon Pinot Noir.

Jennifer Leddy, DVM, cVMA


Originally from South Florida, Dr. Leddy began practicing veterinary medicine in 1993, after receiving her DVM from the University of Florida. After graduation, she followed her call to Go West, loaded her pets in the car and drove directly to Oregon!  Her veterinary interests include the human-animal bond, geriatric medicine, pain control, hospice care, and supporting quality of life for pets and their people.  After many years in the Portland area, including owning her own practice for 10 years, Dr. Leddy decided to make a change and moved to AHVS.


 “I am thrilled and grateful to be able to work with such caring and amazing colleagues. I have always treasured my relationships with clients and their four-legged family members. In a house call practice, I am able to nurture these bonds in a comfortable, safe space where pets can relax. I have ample time for in-depth evaluation, which allows me to select the best treatment choices for each pet and family. It is an honor to be able to work in this way”


Dr. Leddy has served on various local medical boards including the PVMA and the PCC Veterinary Technician Advisory Board. She is also board certified in acupuncture and is working towards becoming certified in pain management. She shares her home with her husband, two amazing teenagers and a collection of four legged creatures.

Veterinary Technicians


Jenn, CVT


Jenn has over 10 years of experience as a Certified Veterinary Technician at a busy, multi-doctor practice in North Portland.  Although born in Canada, she has called the Portland area home most of her life.  After completing her Bachelors Degree in Zoology at Washington State University in 1998, she pursued and obtained a degree in Veterinary Technology from Portland Community College.  She has been a Certified Vet Tech since 2001.  She shares her home with her husband, daughter and 3 furry felines.  Jenn enjoys crafting and spending time with her family when she is not helping pets and their people.

“What I love most about house calls is being able to see our patients in their everyday environment.  They are more relaxed and trusting that they would be in a traditional veterinary clinic.  You get a much better sense and understanding of their true personalities and overall health.”

Rachel, CVT, CCRA


Rachel is an Oregon native. She graduated from OSU in 2008 with a Bachelors degree in Zoology and in Animal Science. That same year she also obtained her Veterinary Technician License. She has been working in the veterinary field since High School and has over 15 years of experience.


Her special interests include animal behavior, nursing, and client education. Her home is shared with her son, 2 boxers, and 2 cats. Away from work she enjoys spending time with her busy 8-year-old. She also enjoys gardening, cooking, hiking, and spending time with family and friends.

Jennifer, Veterinary Assistant


Info coming soon!

Client Liaisons




Believe it or not, Angie lives in Texas!  After working as a veterinary assistant for At Home Veterinary Services for two years and visiting our clients with our doctors, Angie got married and moved to New York to be with her husband and was later transferred to Texas.  Angie didn't want to work for anyone else and wanted to support them in home veterinary care she believes in so much.  So, she now answers our phone, schedules appointments and calls our clients to check in on their pets, all from Texas.  Angie connects to our records system remotely and communicates with staff via Skype, telephone, e-mail, and text!

Peggianne, CVT

Peggianne was raised in upstate NY.  She graduated from SUNY Binghamton with a Bachelor of Science degree and worked several years in biotechnology and in the Peace Corps. She then returned to school in NY to get licensed as a veterinary technician. For the last 25 years, she has worked in veterinary clinics or as a zookeeper in Texas and in Portland. Seeking a bit of a change, becoming a client liaison with AHVS was a perfect match!  "I am still just amazed at the opportunity and timing of being able to be a part of this team.  Their compassion, philosophy and hard work makes coming to work each day something I am grateful to be a part of."


Peggianne shares her home with her husband, labrador retriever, 2 cats, and an Amazon parrot.  In her spare time, she enjoys taking her Labrador to the beach, forests or out to breakfast at a dog-friendly restaurant!  Portland is also a fantastic environment for running races and triathlons! (the dog participates in the training - at least the swimming and running, she hasn't learned how to ride a bike!)

© 2019 by At Home Veterinary Services

Our Service Areas

Lake Oswego | Tigard | Tualatin | West Linn | Wilsonville | Portland | Sherwood | Oregon City | Happy Valley | Milwaukie | Gladstone

Other surrounding communities may also be served, please contact us for more information.

We're sorry, but we do not provide service in the State of Washington.