I grew up in Vermont. Around my town were plenty of dairy farms, inviting the always wonderful manure aroma. An aroma that nearly forced my father to inhale deeply through his nose, saying, "Ah, fresh Vermont air!"
That's an excellent Dad one liner, as are most dad jokes, but he had another great one that I'm getting to.
You see, the hay bails we saw growing up in Vermont were mostly the cube variety. Hay bailing technology at the time created cubes of hay, so that's what dotted the fields they'd graze in.
As we grew older, we starting noticing the now more common round bails of hay. Dad was not pleased.
I asked him what the problem was or, at least, what his problem was with the round bails. The best jokes are set up when you ask for them.
So, he tells me. New farming technology allowed the round bails to be created more efficiently. They used less fuel in the bailers, took less passes on the field to gather the hay. They used less twine, and even though they didn't fill a truck as well as square bails, there was still a net monetary gain from the efficiency gained elsewhere.
However, studies were done on the bails. The cows approached them differently due to the different alignment of surface area. The way the rain hit the bails and rolled off as opposed to soaking in leached nutrients out of the hay. Some cows even mistook the shape of bail for another animal, and approached them so nervously that their heart rates were known to raise significantly; such a rate that a tinge of acidity could be tasted by those in the know in their milk.
What all of this amounted to... is that with the new round bails of hay, the cows just weren't getting a good square meal.