Cows are one of your primary sources of revenue in the game. One of the buildings on your farm is a cow barn. In it are 5 stalls; 4 for standard cows and the 5th for a pregnant cow (if you have one). In the upper right corner is a bin that hold the fodder, and the boxes around the room are where you place the fodder so your cows can eat it. You can't buy a cow without having a certain amount of grass planted first. Once you buy your first medium-sized cow, you'll get a Cow Bell for free, and you can use it for herding your cows. Calf »15 Days » Med Cow » 23 Days » Cow