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

Featured Articles


When you think of the word ‘pumpkin,’ does it conjure up thoughts of jack-o-lanterns at Halloween or a fantastic pie at Thanksgiving?  Chances are, most of us only ponder pumpkins during the autumn, but if this is true, we (and our pets) are missing out on some great health benefits from this member of the squash family. [...]

By admin-1   |   August 15, 2019   |   Categories: Nutrition   |  

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During the past few weeks, there has been a whirlwind of press coverage regarding the FDA’s report on dilated cardiomyopathy (DCM).  Although this report was inconclusive, showed no causality, and failed to link the condition to pet food, there has been a rush to judgment by various media outlets which has both perplexed those of us in the pet industry as well as pet parents throughout the nation. [...]

By admin-1   |   July 15, 2019   |   Categories: Nutrition   |  

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When you have a doctorate study animal nutrition and having over forty years in companion pet nutrition, people tend to ask you a lot of questions about what to feed their pets.  The answer, however, is not always a straightforward one. Animal nutrition must take many things into account, such as the physiology of the animal as well as how ingredients can distinctively aid in health and longevity. [...]

By admin-1   |   June 14, 2019   |   Categories: Nutrition   |  

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As we move into the months of warmer weather and increased outdoor activities with our pets, I thought it wise to visit the subject of hydration and the dangers of dehydration. [...]

By admin-1   |   May 14, 2019   |   Categories: Nutrition   |  

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As many of you know, I have dedicated my life to animal nutrition. Over the years, I have seen my share of erroneous information not based on scientific research. However, in recent years this trend has increased dramatically due to the internet. [...]

By admin-1   |   April 12, 2019   |   Categories: Nutrition   |  

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Beet pulp is the dried fibers left from the extraction of its sugars for human use as a sweetener. Most animal nutrition researchers consider beet pulp an excellent moderately fermentable fiber source that has pre-biotic properties.  [...]

By admin-1   |   March 11, 2019   |   Categories: Nutrition   |  

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As many of you are aware, in July of 2018, the FDA stated they were investigating a possible correlation between dilated cardiomyopathy (DCM) and ingredients contained in certain pet foods and taurine deficiency. Although the FDA study is a theory and in its early stages, this letter is to provide you with the latest information available on this subject. [...]

By admin-1   |     |   Categories: Nutrition   |  

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It is rare that we humans think of the word ‘meal’ beyond what we see on our plates and put in our pet’s bowl. However, understanding the word ‘meal’ within the ingredient list on a dog food bag can bewilder even the most astute pet parents – with little wonder. The ingredients of pet foods [...]

By admin-1   |   January 21, 2019   |   Categories: Nutrition   |  

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