Note that we've run out of antibiotics *not* because we keep feeding them to livestock, but because it's too expensive to make new ones.
That's not true anymore. Several strains of resistance have been tracked down to specific industrial farms.
And to inject my opinion in the discussion: the marketers who've been claiming for decades that it's OK to daily feed antibiotics to cattle, never mind all the indications to the contrary, should be given the death penalty for all the irreparable damage it's gonna cause.
The first version always gets thrown away.