Food labels such as “veggie burgers” and “Tofurky” prompted a new Missouri law making it illegal to stick meat-like names on products that aren’t made from meat — pitting cattlemen against vegetarians in a food fight poised to spread across the country. The battle is heating up as new foods flood the market, from vegetarian items that emulate animal proteins to soon-to-come lab-produced meat that never saw the inside of a barn and makes ranchers fear for their livelihoods.Even though the Missouri law is being challenged in court, a handful of other cattle-raising states, including Iowa and Montana, see it as a precedent they may want to follow. And there is precedent for state food-labeling laws leading the way for U.S. regulations. A Vermont law requiring labeling of genetically modified foods took effect in 2016, and several other states followed suit. But Congress overrode Vermont’s requirements by passing a nationwide GMO labeling law, which critics argue is weaker than the state law.