How REX came to be

Seattle based, small animal veterinarian Dr. Sara came home from work one night with a decision…a decision that would change the lives of herself, her husband, & ultimately many others. She had decided to start a mobile veterinary practice specializing in end of life care for pets, Compassion 4 Paws.

Sara, having focused her education & career on veterinary medicine knew very little about the how to’s of starting a mobile veterinary practice from a business perspective.

She quickly realized her most challenging task would be creating a way to manage the many day-to-day activities of her practice.

Sara turned to her husband, Dennis, who has a background in business & entrepreneurship, for help.

Together Sara & Dennis spent hours trying combing through software applications in efforts to find a program that would suit her practice’s needs. Unfortunately, NOTHING came of it. They discovered plenty of impressive software applications for traditional veterinary practices, but nothing that seemed to be the “right tool for the job” for a mobile practitioner.

“Yes, there are great veterinary software programs available, however it is often rendered ineffective when applied to the unique and specific needs of the small mobile veterinary practice, especially when the practice is focused on hospice and EOL care.”

Dennis began to investigate software development houses that could build a software application specifically for Sara’s practice.

Not long into the process of creating the software for Compassion 4 Paws, a compelling question struck the couple….”If we cannot find an adequate software application, what about all of the other small mobile practices?”

It was this question that ultimately shifted the focus from a simple project for Sara’s practice, to the monumental task of designing & launching a software solution, specifically with the small mobile practice that has an emphasis on end-of life care, in mind. Thus, REX was born.

The people behind REX

Dennis Hopkins: REX founder

I was born and raised in Toronto, Canada. For as long as I can remember, I’ve had a passion to create and solve problems…. especially solve problems that make peoples lives better.

After I obtained an Honors Degree in Philosophy from the University of Western Ontario I moved to Vancouver, British Columbia where I continued my education, this time with a focus on business and entrepreneurship.

In 1999 I settled in Seattle, where I now live with my wife Sara, our young son, our cats Tallulah and Sushi and our dogs Roy and Tilley.

When I’m not “playing with REX”, I enjoy camping with the family, canoeing, kayaking and fine woodworking. Yoga and meditation are important parts of my life as well.


Dr. Sara Hopkins: REX founder


I was raised in Toronto, Canada and moved with my family to the United States in 1991. I’m happy to call Washington State my home, where I’ve lived since 1996.

For years I knew that I wanted to work with animals. I completed my veterinary education at Washington

State University in 2000, and more recently, veterinary acupuncture through the International Veterinary Acupuncture Society (IVAS).

I practiced at an Eastside small animal clinic for 11 years. I loved my work there, particularly my patients and their families. In the later years, I developed an interest in pain management and a passion for giving pets the dignified and loving end-of-life journey they deserved. In 2013, I felt the need to combine my acupuncture training with my love for compassionate care of animals in a home-based setting, and founded Compassion 4 Paws.

I’m so glad I did. I find nothing more fulfilling than offering pets the care and dignity they deserve in an environment where they’re completely comfortable.

In the fall of 2017, I became one of the first veterinarians to achieve certification in Animal Hospice and Palliative Care through the IAAHPC (International Association of Animal Hospice and Palliative Care). The 16 month course furthered my knowledge to better support pets and their families during their end-of-life journey.

360 Works

360 Works is a very well recognized software development company located in Atlanta GA. Headed by Joe Pampalon, our 360 team has been key in the development of REX software platform.

Productive Computing

Productive Computing is another very well recognized software development company.

They are located in San Marcos, CA. Our Productive Computing team has been responsible for the graphical UI of REX, and the reporting module. They are also responsible for managing and maintaining the AWS servers that host REX.

Our passion is help your practice succeed