Ignore the charts and do research.
Those sites and chart can be accurate at times, but they are based on opinion.
NB does not contain as much meat or protein as some other foods. Does that make it bad? No. However, for those who want a food higher in protein, it may not be a good choice. Wellness works well for some dogs and for others it seems to cause GI upset. Sooooo, different foods for different dogs...