Cows love being on the pasture because then they can graze peacefully all day long. Needless to say, this makes them very thirsty too. That's why the farmer regularly fills the big tanker with fresh water and drives it over to the animals. When it's empty, she tows it away with the tractor and refills it. After a lovely day on the pasture, the farmer drives the cows to the milking machine in the livestock building in the evening and fills milk cans with fresh milk.