Any decision to cook beef is going to result in amazing flavor. With that said, older cows that are being sold won’t offer the same steak and roast experience as a younger animal, and are mostly used for ground beef. However, older animals may come at a discount and still offer great-tasting ground beef. Many grain-finished cattle are harvested around 15-18 months of age. Grass-finished cattle are usually older because they take longer to finish on grass. Whether grass-finished or grain-finished, you’re still going to get an exceptional experience at the dinner table.