You can get milk if you take care of your cow. Win money by playing the cow game.

In this game, you can name your cow. To feed the cow, you will need to give him water. Gather cow coins and spend them at the store on food and water. Milk the cow, then sell the milk to the store. You can also level up and receive benefits by putting the cow to sleep. Include new livestock in the barn (chickens, pigs, and horses). Once you've gotten to levels 8, 24, 32, 40, 48, 64, 72, 80, and 99, you can alter how your cow looks (the cow has various awesome outfits).