Badly applied gene science, or just bad article?

Forbes writes that a pharmaceutical company, Hematech, produced genetically engineered cows that lack the proteins producing the prions causing the so called Mad Cow disease. My first reaction to the headline was “Great, so now unscrupolous farmers now can go back to their habit of making cannibals out of cows.” But luckily it doesn’t seem like that is the foremost goal, even if it could be a side effect: Hematech wanted to develop a system to be sure that their own products were free of the deadly prions.