Make Millions of Farmville Coins

You can make millions of coins in Farmville after level 75 repeatedly harvesting your dairy barns if you fill them full of BELTED COWS.  All you need to do is save up and buy belted cows. Then replace all the cows in a dairy barn with the belted cows but leave the other cows on your farm as 'seed' cows.  Now once a day, you can move the 100% ready cows on the farm to your dairy barn.  This will ready the barn allowing you to harvest it.  Every belted cow that is in your dairy barn will yield 3000 coins (so 120,000 coins x the number of cows you have outside your dairy farm that are 100% ready...  If all the cows outside are belt cows then 10 harvests is 1.2 million coins...)