Wanna see some happy cows? Then you're in for a real treat! "Koeiendans" is a Dutch term meaning "cow dance." Why are these cows so happy? They've been inside their nice warm stalls in the Netherlands for five months, which is good when it's cold outside, but gets a bit frustrating after a while. Now they get to go outside to frolic through the fresh new grass in the pasture. You'd be dancing, too!