I’ve heard but can’t substantiate that the ground beef Taco Bell uses is actually graded below Alpo by the USDA.
I began calling them Alpo Bell for years because their ground “meat” resembles dog food. I used to eat there after closing the bars and having the munchies. The next morning it was hard to tell if it was the alcohol or the Alpo Bell that made me feel so bad.
I believe that Snopes has stated that that was just a urban legend.