Meet The Team

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Gabrielle Walker-

Founder - Pack Leader - Pet Sitter

Gabrielle Walker (real last name) founder of Fit Dog Theory, is a professional dog walker, certified in canine behavior, pack management, safety and fight protocols, as well as pet CPR and first aid. Gabrielle is a team player who is dedicated to providing her clients the services and tools they need to provide an abundant life for her client's pets. She is patient and respectful with each animal in her care and treats them as if they were her own.

Professional Certifications

  • Graduate of Pawsitive Tails- Dog Walking Academy.

  • Insured and bonded with Pet Sitters Associates.

  • First Aid and CPR certified by Pet Tech.

  • Fit Dog Theory is licensed with the city of Walnut Creek.


Dori Shafer-

Dog Walker 

Dori meets and exceeds a high level of professionalism and integrity that is required for a dog walking position with Fit Dog Theory. Dori is born and raised in the Bay Area and currently lives in Pleasant Hill. She was an executive assistant to the Vice President of Operations, Senior Vice President, and Vice President of Manufacturing for Dreyer’s Grand Ice Cream for 22 years. She is used to dealing with high-pressure situations often, takes directions very well, has excellent communication skills, and can work with and adapt to all kinds of people and personalities. 


Hobbies and Interests: Dori is a huge A's fan, has had season tickets for many years and works for the A's part-time during the baseball season. Dori loves small dogs and previously had a terrier mix for 13 years.  She now has a “Grand-dog”, a Yorkshire Terrier named Coco. 

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Amanda Flores-

Dog Walker & Pet Sitter

I would like to introduce you to our new pack leader, Amanda Livi. Amanda has a high level of professionalism and integrity from past work experience. Amanda is very alert, caring, goes above and beyond, learns quickly and takes initiative with the dogs best interest always in mind. Amanda has a degree in Liberal Arts, and is an artist. She has lived with dogs her entire life and wants to adopt a border collie. She is from Texas, loves California weather and adores the outdoors. 

"My husband and I moved from Texas to the East Bay and it has been an absolute joy exploring the beautiful California trails with the pups at FitDogTheory! I am an artist who specializes in print making, acrylic painting, and graphite/charcoal and I find constant inspiration in the positive attitude the dogs always posess. It's impossible not to get caught up in their excitement when I pick them up for pack walks. Knowing that we are keeping each other fit is just the icing on the cake!"

-Amanda Flores