They use a cow-culator! Ba-dum-tsss!
It was a Good Year...
One mucks about the mountain. What's the difference between a police batton and a magician's wand One is used for cunning stunts.
Because he always gives sound advice. Ba dum tsss.
They herd it through the bovine.
A BoVine
One of them ruins your life. The other's just meth.
Refractions
A cow-culator! (Cue groans)
You use a cow-culator. Or you round them up. Or any other method the commenters want.