All Basics recipes start with real meat from a single animal protein source not often used in dog food, plus they include pumpkin and easily digested carbohydrates. (amazon.com)
It is a known fact that dog food products that don't have a named animal protein source as their first ingredient are most likely not a good formula. (diamondpup.com)
However there are many issues raised against the use of animal protein sources in supplements. (aminoacidstudies.org)