He knows that big corporate chains buy beef from all over the world, the cheapest and worst cuts, then macerate it, and glue it together to look like steaks. Hamburgers are lots of cows from everywhere ground together. Unless it comes from your local butcher, you're not eating beautiful US beef.
Oh and your lovely local beef may give you BSE because dead cattle are fed to live cattle as powdered supplements in the USA.
That is also true. I forgot that this is a practice in the US.
The USDA banned this practice in 1997
That is good to know. However, poultry litter is allowed to be fed to beef cows, and is a known factor in the cause of botulism in cattle, and is a risk in the case of H5N1. And with regulatory agencies being dismantled, it would not be a far stretch to see farmers return to the previous practice.