The manufacturer is quite proud of the nutritional value of this product, and I have no reason to doubt them.  I also have no way to check their claims, so I will report on what I do know.  Whenever we try a new variety of dog food, there can be issues.  First, the dogs may not like it.  Second, the change my cause digestive upset manifested by diarrhea, etc.  Neither of these was an issue with this food.  No digestive problems are happening, and the dogs seem to really like it.  I think that's all I can ask for in dog food.