Wooly lemmings

Douglas Adams had a few words to say about sheep:

...It was cold and windy, which was normal.
It started to rain, which was particularly normal.

A spacecraft landed, which was not.

There was nobody around to see it except for some spectacularly stupid quadraped who hadn't the faintest idea what to make of it, or whether they were meant to make anything of it, or eat it, or what. So tthey did what they did to everything, which was to run away from and try to hide under each other, which never worked.

So Long, and thanks for all the fish, chapter 1

A little later on, the protagonist takes a stab at telephathy, which can't be mind-reading, which would presuppose the existence of a mind:

...He was surprsied to find he could feel the sheep being startled by the sun that morning, and the morning before and being startled by a clump of trees the day before that. He could go further and further back, but it got dull because all it consisted of was sheep being startled by things they'd been startled by the day before.

Ibid., chapter 7

What brought that to mind is, well, this:
450 sheep leapt to their deaths in Turkey, for no obvious reason.

I just hope this is never used as an argument against evolution.