NYT: Many people who run or walk with their dogs treat them like human running partners, offering them sips of Gatorade or half of a sports bar during a workout. But the latest science about performance nutrition for canines underscores that dogs are not people. They have more fur and cellular mitochondria, the small structures in cells that generate energy; lower body weights; and fewer fecal-related inhibitions than their human companions, each of which affects their nutritional needs.

Humans and dogs fuel exercise very differently. When we run, we start out burning mostly glycogen, which is stored carbohydrates. Dogs don’t, partly because they have more mitochondria in their muscles than we do. Dogs burn fat as their primary endurance fuel, and carbohydrates are not very important for them.

There’s no reason to give a dog a sports bar, which is full of carbohydrates, during a run. Same for those gel packets. I see people sharing them with their dogs. The dog may like it, but its not helping its running. Fat is the fuel for performance dogs.

See link for canine diet instructions on fat, protein, treats, raw-food, and hydration: http://well.blogs.nytimes.com/2014/08/20/the-science-behind-your-dogs-special-exercise-needs/?