Ken,
Over on the Gundogsupply forum, you can find years of nutrition threads.
I'm no doctor or vet, but that 60% fat sounds like it would cause pancreatitis?
No, 60% fat is actually the percentage found if the dog was eating an animal. It works out to one third fat by weight, since fat has nine calories per g, as opposed to protein's four. It results in approx 60% of calories, which in the absence of carbs causes the dog to secrete glucagon rather than insulin, which is more healthy and does not suppress, but stimulates the immune system. Pancreatitus occurs when eating carb/fat combinations which suppress glucagon production and cause hyperinsulinemia. Same as in people. That's why dogs are often used in diabetes trials. Much canine nutrition info out there is crap, sponsored by dog food companies. Denials of both Evolution, as well as Biochemistry. Same as human nutritional info. My dogs typically live to 17 years plus.
Regards
Ken
