Concerning UFO's (24 Lines)

This is an entry for "The Writer's Cramp - Poetry Week!" 

The prompt is to use the title "Concerning UFO's"

Concerning UFOs

That day in the pasture seemed slow
Just as days have a tendency to go
We grazed and we looked to the sky
When something caught the collective herd's eye

"Moo!" came the cry, then "lookie! lookie!"
It appeared like a great giant cookie!
What could they want with our ilk?
A never ending supply, yummy milk?

We wondered what should we do?
We decided to play it cool and chew
When in doubt, do what we do best
Ruminate, moo, graze, take a rest

We won't let them change our routine
A plan formed that day on the scene
No matter what promises they give
We still have our bovine lives to live

So, UFOs are welcome to stay
And graze in our pasture any day
As long as they respect our space
And act sort of nice to our face

We won't kick our hooves and snort
Or think up some "get lost" retorts
Our outer space friends can remain
If they act up, we'll banish them to Spain!