Do all cows when eating grass eat facing the same direction?

I think it may have something to do with wind direction.

"A cow with its tail to the west, makes weather the best; A cow with its tail to the east, makes weather the least."

This New England saying has much truth in it, for an animal grazes with its tail to the wind. This is a natural instinct, so the animal may face and see an invader; and invader from the opposite side would carry out its scent to the cow, in the wind. In as much as an east wind is a rain wind and a west wind is a fair wind, the grazing animal's tail becomes a weather sign.
source: http://www.thepetprofessor.com/ copy

Other weatherlore: I've heard personally is that if cows are lying down in the pasture, it's going to rain.
http://wiki.answers.com/Q/Why_do_cows_face_the_same_direction copy

Not that I've noticed with the herds near me. They just eat.

I can imagine that it's not a good survival technique as you wouldn't be able to spot anything creeping up behind you (although maybe if they rely on their noses it might make more sense).

Here's a pic with two cows in the foreground facing in completely opposite directions as well as others facing in various other directions, some of which are eating:
http://farm1.static.flickr.com/44/165284676_1896fe68b6.jpg copy

Busted!

Taken out my back door 5 minuts ago.

When it is coming up to milking time and uddes are full, cows DO tend to munch their way collectively towards the gate.

So then they ARE all facing the same direction - towards the gate because it leads to the lane that leads to the cow shed where the milking machines will syphon off their heavy (and probably aching) udders.

Otherwise theyjust go heads down and follow the grass most of the time.

Even sheep, those well known followers of herd traditions, eat facing whichever direction they like.