All animals need Fats and Proteins and if I'm not mistaken all living things need proteins.Chickens (and dogs) need fat and protien - if you're not going to be feeding them raw meat every day (which just isn't reasonable for most of us),
Well ,I guess this is where we differ . I do feed my dogs a raw meat / natural diet and have seen much better health and less incidents of disease & illness in the last 3 generations .
Also since the nutritional needs of a chicken if very much different than that of a canine there is really no need to say how a canines health may be better on a "raw" diet because it doesn't mean a chicken would be healthier on a "raw" diet.