Count me in with Bez. I'm gonna save my tractor and save my diesel and not "clip" a pasture just to keep a cow from getting something in her eye. And I'm not gonna vaccinate for pinkeye, either. And I'm not gonna spend a lot of money fighting flies---when it gets dry enough, they'll disappear on their own.
I don't mind treating a cow for pinkeye if I've already got her in the chute anyway, but I don't pen cows and run them through the chute just because their eye runs. Of course, I have a cow lose an eye to pinkeye on occasion. That's too bad, but life's tough for a cow.
I really don't care if she has to turn her head or turn all the way around to see what's on that side. A one-eyed cow makes me just as much money as if she had both eyes. But if she loses one eye, she better hope she develops some natural immunity, because if she loses the other one, she's going to town.
"Clipping" pastures to keep a cow from getting something in her eye? Guess I've got a lot to learn.