True. But the principles remain the same. Certain nutritional requirements must be met in order for the dog to survive. Both sets of dogs, bulldogs and sled dogs, must be fed a certain number of calories that matches up with the amount of work being performed daily. Neither set will thrive on too much food or too little food. If over fed and under worked both sets will get fat. If the amount of daily work is greater than the amounts of daily calories both dogs will fade.

With that said, both sets of dogs do better on a higher fat content in their diets. The sled dogs based on science, owner testimonials and owner opinion. The bulldog on the other hand is based on owner testimonials and opinion as there are no scientific programs studying a pit bull doing what a pitbull does and his nutritional requirements. The pit bull enthusiast's only option is to research other's research and apply it as best he can. Mostly with common sense and then with some actual experiment which leads to experience. Experience should then be the basis for that opinion.

The end result is the same. Both sets must perform when the body is drained. The bulldog at the hour mark and the sled dog at a certain mile mark. The dogs have to be trained/worked and fed to be there at those points. EWO