brookcove
Posted : 9/2/2007 3:26:10 PM
First, prey animals in the wild eat a much more varied diet, of things that don't grow in nutritionally exhausted soil. That means levels of some miconutrients are much better and more widely available in wild prey.
Second, wild canids mostly eat (apparently) small animals, whole, which provides something much closer to the complete "ideal" nutritional profile than the limited cuts of meat that the USDA has chosen in their wisdom to make available to the public at large. About ten years ago, when BARF first was gaining in popularity in the US, I was sharing a meal with a vet nutritionist friend. She was laughing at the idea that BARF, with it's veggie/ground recipe, supplements, and rules about bone percentages and offal, was "natural".
"Here's a natural wild canid diet," she said, still laughing. "Take a bird, a rabbit, and the neck of a rotten deer carcass. Throw in some ryegrass and a couple berries and blend it all together. Feed as much as the dog will eat for three days, then about a cup the next two, then nothing but a soup bone the last two days of the week."
The nervous tissue and skin and connective tissues that are found in the "trash" from slaughtered animals, contain many key nutrients that are not found in bone or muscle. Hair/feathers provide bulk that soothe the gi. If you don't have these things in your dogs' diets, it's most likely going to have to come from somewhere else.
Last, wild canids aren't usually the picture of health. Although we do have screwed up breeds that don't live long no matter what, it's not unreasonable to expect a dog to live into its teens these days, all other things being equal. I can even name some large breeds that can get up to that age regularly. Studies have shown that nutritional deficiency does often play a part in the shorter life span of wild canids.