According to an in depth analysis from Slate says Michigan's official meat is corned beef. From the article:
The Dinty Moore is a delightfully named sandwich, so much so that its contents actually come as a letdown: corned beef, lettuce, tomato, and Russian dressing on rye. (It and Hormel’s line of beef stew can trace their names back, in a convoluted fashion, to an early-20th-century Irish restaurateur in New York.) If the Dinty Moore were Michigan’s only contribution to corned-beef culture, I’d hesitate to entrust it with corned beef as its state meat. But Detroit is also home to Grobbel’s, “America’s oldest corned beef specialist.” Sold!Not the most ringing endorsement, but at least we didn't end up with squirrel. Sorry West Virginia.