If you are in Canada like me and have a store that carries presidents choice products like the superstore, I would recommend you try their president`s choice Nutrition first dog food.
My boxer and JRT love the lamb & rice formula, and the salmon & potato formula.
It has no wheat, corn or soy. No by products. good prebiotics and digestible protein sources with ratios under 30%. I get a 30lb. for $38.99 in my area.
The orijen and Acana where really good for my dogs in the beginning, but I find the high protein % in my case where too hard on my boxer and JRT over time. Rumbling stomach, smelly gas, real smelly poo with the doggy breath.
The President`s choice Nutrition first has all the premium ingredients with a more manageable protein %.
I have recommended this to my neighbours and friends with labs, St. Bernard, JRT and especially other boxers with great success.
All of them commented their dogs appetite and enthusiasm returned, along with not eating as much grass as before.
I walk my dogs about 10km a day and find the food very adequate. Unless your dog is working the farm all day, or pulling a sled 50km daily these super high protein foods maybe doing more harm than good.
I wish you the best of luck.