Nutritional Facts

With Dr. Randall Johnson

At Do Only Good, we understand the power of science-backed nutrition. This is why we have partnered with Dr. Randall Johnson, one of the foremost pet nutritionists in the industry, to provide you – the pet parent – with the latest scientific information regarding pet nutrition.

Dr. Johnson has over 36 years of business and academic experience in animal nutrition.  He is a registered professional animal scientist, a diplomat in the American College of Animal Nutrition, a professional member of the Institute of Food Technology, the American Society of Animal Science, and the American Association of Veterinary Nutrition. He has trained over 200 nutritionists and their staffs in over 26 countries on how to formulate pet diets.

With his extensive knowledge of pet food nutrition and formulation, Dr. Johnson’s articles will keep you well-informed and aid you in choosing the optimal diet for your pets.

If you have further questions after reading the articles, please click the “Ask Dr. Johnson” button and he will be happy to help you.

Ask Dr. Johnson


By admin-1   |   July 20, 2020   |   Categories: Nutrition   |  

As many of you know, our mission is to Do Only Good for the health of all dogs and the planet.  It has also been our mission to keep you informed of any updates regarding the FDA’s report of two years ago regarding the disease dilated cardiomyopathy (DCM).  Recently, a literature review published in the Journal of Animal Science showed no fixed correlation between grain-free dog food and DCM.  We sat down with one of the journal articles authors, Dr. Stephanie Clark, to discuss not only her research but her views as a devoted pet parent and the importance of animal nutrition.

Dr. Stephanie Clark is a Licensed Veterinary Technologist and a Ph.D. Companion Animal Nutritionist.  As a scientist, she did her graduate studies focusing on nutraceutical research and microbiology.  She did her post-doctorate at the Mayo Clinic.  As a devoted pet parent, the health and longevity of “her girls,” is of utmost importance; Anny, a foster pitbull/dachshund-mix and her beagle-mix, Gracie who, as a puppy was ever-present throughout her academic career.

Dr. Clark graciously allowed us to ask some questions about the research she co-authored so we could better understand their current examination and scientific finding concerning DCM:

Recently, you and four of your colleagues published a peer-reviewed journal article entitled, “Review of canine dilated cardiomyopathy in the wake of diet-associated concerns.” What motivated you to research dilated cardiomyopathy (DCM) concerning canine diets?

This is a devastating disease that we have either seen clinically, provided nutritional consultations for, or have experience within the pet food industry. As veterinary researchers, we wanted to better understand how our future research projects could fill in the gaps.  This necessitated us to dive deeper into the past literature to understand what we know and where the work still needs to be done.

Can you briefly describe for us what DCM is?

Dilated cardiomyopathy (DCM) is a disease of the heart muscle that results in progressively decreased cardiac function. The natural progression of disease results in congestive heart failure, arrhythmias, and sudden death. 

You and your co-authors go into detail regarding the Etiology (causation) of DCM.  Could you briefly explain your findings regarding DCM origins?

DCM is a multifactorial disease. Some of the etiologies include predisposed breeds (genetics), infectious or inflammatory conditions (myocarditis), endocrine diseases, chronic increased heart rates, toxins, and nutritional deficiencies. 

What links (if any) did you find regarding diet being causation of DCM?

Based on past literature, dietary causes are centered around nutritional deficiencies, such as diets low in protein or taurine precursors, imbalanced or too high fiber content, and deficiencies in amino acids and/or micronutrients.

When we asked why she chose to be a Companion Animal Nutritionist, Dr. Clark told us she first wanted to be a veterinarian.  However, she found research more exciting.  She stated, “nutrition affects everything, including the immune system, brain, skin, and coat.  Throughout my career, I have seen what a bad diet can do to a cat or dog.” For example, Anny was malnourished and rescued from an abusive home.  Dr. Clark believes that proper nutrition, regular walks, playtime, and mental stimulation are all essential factors in aiding in the health and longevity of our dogs.

Next month, we will continue our interview with Dr. Clark.  If you would like to read the published literature review by Dr. Clark and her colleagues, here is a link to the article:


Autumn Sale

Save 30% on all kibble & pumpkin with electrolytes

Coupon Code: FALL4DOG

Save 20% on ALL other D.O.G. products