No need to read further, this isn't written by a scientist.
It's obviously written by a fool that somehow thinks livestock will go to market just as fast on a reduced diet as those on full feed.
Nice to have the idiot stuff right upfront. Saves time.
He wrote it inartfully, the author could have stated that reduced feed for livestock results in higher prices for feed, resulting in lower numbers of livestock raised. He probably assumed that the reader would be intelligent enough to know this.
Your assertion that the author implied the same number of livestock would continue to be raised is far more specious than anything the author wrote. So perhaps you should reconsider who is a fool, and what is and isn’t “idiot stuff”.
Or the assumption that biofuels leads to less fodder for livestock and thus fewer livestock overall.
Because, ya know, the world really needs more carbs, sugars and fats that biofuel is made from.