Your task is to fill the tank with milk. You will need to milk the cows. The main thing is not to overdo it, because poor animal will die, if you torture a cow for a long time. You must be attentive, you have to milk your cow, if you don't want to see how it explodes because of surplus of milk. And do not forget to look for the trough and throw food. Remember, cows are alive animals and they like attention. Good luck!