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I have fed Acana (still feed it) made by the same company as Orijen, to multiple dogs (I was feeding six med/large sized dogs for a number of years) for over 15 yrs. every dog has done well on it, never had one refuse to eat it, nor have I ever had any problems/ issues with the quality of the food.
I did find the Orijen too rich for my dogs, but that is not to say your pup will not handle it just fine.

 

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Orijen is a high quality food, but it has a high protein content approx. 40% (not a bad thing) but some dogs just don't tolerate it as well as food with a lower protein content. The Acana I feed has a protein content of approx 30%. One thing to keep in mind is that when feeding a higher quality food you generally feed a smaller amount - my 75 lb golden retriever was fed 2 cups of Acana a day and maintained good health and good body weight and lived an active life until he passed at the age of 13 1/2 yrs.