Hmm. I wonder if feeding cows what they are actually genetically designed to eat, would do the trick? Rather than, ya know, feeding them corn because it's cheap because it is subsidized by the government because there was a corn surplus one year and the government started buying corn from farmer to avoid a farming crash, and the new system was poorly designed so it actually encouraged the farmers to grow more corn, so the federal government then funded a government program to find more uses for this huge corn surplus, which led to the development of high-fructose corn syrup (HFCS), which was then integrated into all kinds of foods like soft drinks and bread and canned food, which led directly to the obesity epidemic due to the incredibly high caloric count of all these HFCS-containing foods, and... Nah. Cows just fart too much. Let's mess with their biology so they can consume this food these ruminants were never supposed to eat.