If your dog gets too much protein it will overwork their kidneys processing it, I don't see any benefit to giving a lot of protein to a dog unless it's working long, hard hours. Dogs aren't really meant to eat everyday anyway. Canines have always, before domestication, eaten sporadically,...but gorged themselves on a meal when they got one....least that's the way Mother Nature used to do it.....and you KNOW that you don't fool with Mother Nature!!!!
