http://www.isdra.org/Beginners/Introduction/what_do_sled_dogs_eat.htm

Fats and protein are the most important sources of energy for a
sled dog. The ratio of fat and protein varies depending on the distance to
be run and the time spent running, however,
certain minimum requirements have been determined.
A typical diet consists of 32% protein, 15% carbohydrates and 53% fat.

'bout right.

Philip Thrift
http://www.paleofitness.com