Genetics. Some breeds of cattle are brown, others are a variety of other different colours. This is all a part of genetics.
No, Brown cows do not have brown milk.
You get strawberry milk from the pink cows, Milktonium from the green cows, chocolate milk from the brown and regular white milk from the brown and white cows.
~Only when they "mooo" ~Only the cows with brown spots ~Only female cows
No cows are not green unless you us green dye on them
This question is impossible to answer because there are a wide variety of colouration, breeds and crossbreeds of cows in the world. And the number of cows with brown spots in each country differs greatly from year to year.
Yes.
Likely a Jersey.
because of their breed. or the type of breed they are.
Dark Brown to Light Tan
yes
No, because they are both the same species. They will both use the same communication.
6 if it is a regular black and white cow. Brown cows are 12 and pink cows are 18.