We're feeding Earthborn holistic Primitive Natural and my sheltie is full of energy, looking all pretty, having the great shiny coat and tiny poos. I couldn't ask for more. But it depends on your decisions whether to feed your dog w/ high protein food only less or lower protein food and give him more. All I can say is that every dog is an individual, but I've read great reviews on this one. Also my always picky dog takes this dry food even as a reward 
http://www.earthbornholisticpetfood.com/us/dog_formulas/primitive_natural/
If you decide to go with low protein, I'd either go w/ Taste of the wild or try raw meat. Once per week my dog usually gets raw meat, too and he's loving it..

http://www.earthbornholisticpetfood.com/us/dog_formulas/primitive_natural/
If you decide to go with low protein, I'd either go w/ Taste of the wild or try raw meat. Once per week my dog usually gets raw meat, too and he's loving it..
He is 21, not much I can do!!