The kicker is that the dogs have not evolved to the point that nutritional information from the 70's and 80's will not work.
I think some go a little far with supplementation. The ingredients are great but the dog does not get that full feeling and in turn does not digest as well. The greens and/or the use of kibble help keep the gut/digestive tract working. This is a must if the particular keep allows the dog to stay outside.
In the colder months, a keep diet less kibble or greens will make maintaining weight a little more difficult. On straight RAW you will see a little more swing in the weight AM to PM to AM. For no better analogy the raw is a one pass, great assimilation and out. Leaving the gut, stomach and tract close to empty. In turn the dog will shiver its own bodyweight in the night.
Even if you up the raw food amount they will do a great job of assimilating.
The greens and/or kibble will, for lack of a better analogy, will hang around a little longer. So during the night the dog will continue to digest. Providing body warmth in the cold.
The end result is basically the same, the dog will empty in the morning, the raw dog will have a smaller turd and the green/kibble will be a bigger turd.
And with all that said, the next guy will go a different route and that way will be the 'right way'.
EWO