Originally Posted by bengalbabe
Because they don't want you to know what the by product is. How many of you would buy a package of pet food that listed like this:
chicken feathers,chicken fecal matter,diseased chicken tumors,ascarid worms from cow intestines,dead chickens that were starting to rot,corn meal,spray digest (which is fermented meat till it turns to liquid and sprayed on the kibble), vitamins(to make up for all of the nutrients your not really getting). minerals (for the same reason).
If pet food compaines were made to tell the exact truth about the products that's exactly how the labels would read.
Poultry by-product: This can include nonrendered clean parts of slaughtered poultry such as heads, feet, and viscera free of fecal content and foreign matter except in such trace amounts as might occur unavoidably in good factory practice. I put that last part in bold to warn you since it's not a guarantee.