Hey, PM'd you the track diet for racing greys. Also, I was looking into lure coursing with Giselle a while back, but I didn't have the time or resources to condition her for that so I dropped the idea. However, I did buy a book from a prominent lure courser who wrote a lot on diet. I know she wrote a lot about carbs and its role in a canine athlete's diet, but I packed it away temporarily because we're re-doing our hardwood floors. I can get you an excerpt tomorrow, though.

The way I see it, dogs, as a species derived from wolves, may be better adapted to utilizing proteins and fats. However, to say that carbs are unnecessary is a bit of a stretch and, imo, not completely true. I'm not a die-hard "dogs-must-eat-meat-and-nothing-else" person, so my opinion may be skewed. However, biologically speaking, it's probably best to keep a canine athlete on a protein/fat heavy diet. Yet, it's probably not economical and it's not always feasible. Dogs may digest faster than us, but, from what I've learned, the body's cells run heavily on glucose, amino acids, and fatty acids. You get the latter from protein sources, but you get the former from carbs. So to eliminate carbs completely from a canine athlete's diet is not very beneficial, IMO. For the sedentary dog, sure, a no-carb diet might work. But for an athlete who performs strenuous work, I think eliminating carbs would be more harmful than helpful. My two cents