Hate to break it to you but your local supermarket and big grocery chain uses cow beef for ground beef also. Same stuff as McDonald’s. You guys are perpetuating old info (circa 2012) that has to do with XF trim and LFTB.

So wrong here. They grind trimmings, the same trimmings that are ground into ground beef that sits in the counters of your local retailer. I sell this shit and can guarantee you the McDonald’s system is not my last option, those trimmings all make it into the food supply. Also you can’t feed cow parts to food animals ,it’s a BSE risk.