the grade of ingredients.
http://www.naturapet.com/display.php?d=faq-detail&pxsl=//faq%5B@id='1803'%5D
"The term ''Human Grade'' is not printed on the packaging because AAFCO (Association of American Feed Control Officials, the governing agency for animal feeds) regulations prohibit us from printing the grade and/or quality of any ingredient contained in pet foods."
Who/what-the-heck is the AAFCO?
http://www.aafco.org/The term AAFCO stands for the Association of American Feed Control Officials. A basic goal of AAFCO is to provide a mechanism for developing and implementing uniform and equitable laws, regulations, standards and enforcement policies for regulating the manufacture, distribution and sale of animal feeds; resulting in safe, effective, and useful feeds. The Association thereby promotes new ideas and innovative procedures and urges their adoption by member agencies, for uniformity.
Purpose and Function of AAFCO:
The purpose of the corporation shall be to establish and maintain an Association through which officials of any state, dominion, federal or other governmental agency and employees thereof charged with a responsibility in enforcing the laws regulating the production, labeling, distribution, or sale of animal feeds or livestock remedies may unite to explore the problems encountered in administering such laws, to develop just and equitable standards, definitions and policies to be followed in enforcing such laws, to promote uniformity in such laws, regulations and enforcement policies, and to cooperate with members of the industry producing such products in order to promote the effectiveness and usefulness of such products.