If you see this statement, it means that the food contains 51 % or more of whole grain ingredients by weight. (naturesownbread.com)
However, the reason that most grain - free formulas are more expensive is because they do not contain grain ingredients as «fillers» in order to bulk up the formula. (petcareeducation.com)
Some whole - grain ingredients include whole oats, whole - wheat flour, whole - grain corn, whole - grain brown rice, and whole rye. (choosemyplate.gov)