It's about "life in rural Wisconsin".
When we were young, my cousin liked to stick his head out the window on country rides (does anyone go on "Sunday drives" anymore?) whenever we passed a field full of cows. He loved the cow smell. I guess it wasn't too bad. Not like when passing a cattle yard with hundreds of cattle crowded together. There is such a place right on an interstate I use to get to my dad's house. Even with the windows up you have to nearly hold your breath as you pass it. Give me "dairy air" any day over that!