I have Riley on ACANA. I just buy the really small .88 bags of it, because I feed him Primal RAW in the mornings and the kibble, at night. I switch flavors, every bag. I just recently tried the Ranchlands and he Loved it. He is now on a bag of Grasslands. I also sprinkle it with a teeny bit of Coconut Therapy/Coconut Chips.
CocoTherapy
Also, if you Google "Orijen White Paper" a very informative pdf talking about dog nutrition. It is a Great read. It has a whole section on protein.
Good Luck!