The farming system of black and white holstein friesland cows and the effect of feed composition?

Holstein cows are mostly black and white, yes, but there are a few cows that can be all white with little hints of black, or all black with little hints of white. Red and white holstien cows can be...

Think of cow-hide color as a "commutative" property. For instance, 1 + 2 is the same as 2 + 1. Therefore, they can be either or. The Speckle Park breed, for instance, are white with black spots or...

Think of cow color as a "commutative" property. 1 + 2 is the same as 2 + 1.

Not much, other than the fact that they're opposite in coat colouration to each other.

That all depends on the breed.