Do you realise what this means? To them, grass is merely shades of grey, as are the red in their coats. It means that all day long when they are nose deep in the grass they see nothing but a sea of dappled shades of grey.
Something else I learned, from the design on one of the Cows About Cambridge, is that cows lay down along the line of magnetic north, aligning their bodies either south or north.
So that is one up for cows, who are sensitive to the weak electromagnetic force that encircles the Earth, but pity the poor cows whose life is shades of grey.

I pity the poor immigrant
Who wishes he would’ve stayed home
Who uses all his power to do evil
But in the end is always left so alone
That man whom with his fingers cheats
And whom lies with every breath
Who passionately hates his life
And likewise fears his death
I pity the poor immigrant
Whose strength is spent in vain
Whose heaven is like Ironsides
Whose tears are like rain
Who eats, but is not satisfied
Who hears, but does not see
Who falls in love with wealth itself
And turns his back on me
I pity the poor immigrant
Who tramples through the mud
Who fills his mouth with laughing
And who builds his town with blood
Whose visions in the final end
Must shatter like the glass
I pity the poor immigrant
When his gladness comes to pass
Bob Dylan 1967

Look at that front leg, so delicately bent.