To have a meaningful comparison of pet food, you have to look at the guaranteed analysis numbers on a “Dry Matter Basis”.  This simply means that you are evaluating the food as if it contained no water.  Since water has no protein, fat or fiber, you have to analyze the food with out water in the mix.  

The Dog Food Adviser has written a very helpful article (Dry Matter Basis… the Only Fair Way to Compare Dog Foods) on the importance of Dry Matter Comparisons.

Dry Matter

Wet matter guaranteed analysis taken from manufacture websites on 7/18/11.

Price

*for a 30lb adult dog

Pricing obtained from online and brick and mortar stores on 7/18/11

Abbreviation Key

Primal = Primal’s “Canine Chicken Formula”

S&C = Stella & Chewy’s “Duck Duck Goose”