An endless hoard of cows are heading straight to you. In order to last longer, you'll need to find weapons, ammo, and most importantly whiskey! You can hide in a corner or run around like a madman, either way, they'll catch you eventually.
Use your time between rounds to wisely. If you need a break, take a drive to the nearby pawn shop. Once you've found everything you needed, you can head back to work either at the farm or at the nearby cornfield.
Scavenge, barricade, and defend as long as you can. How long will you survive the dairy onslaught?