It doesn't.
Yes, in a way.
Cow years is the amount of human years that are equivalent to one year for a cow. Each year a cow is alive is like 7 years to a human. This represents the process the body of a cow goes through during this cycle.
You obviously have never seen a cow. No, it is born a cow and it just grows larger. Mammals do not have three-stage life cycles.
It should only be a matter of a couple hours.
It's a wonderful life. (Jimmy Stewart, sometime in the 30's)
A cow typically ceases milk production when it reaches the end of its lactation cycle, which is usually around 10 months after giving birth.
Well a cow dose s*** the a dude makes leather out of it
She will bleed a little a couple days after estrus.
A cow's estrous cycle typically lasts about 21 days. This is the period of time between one heat (or estrus) and the next.
Poor nutrition, disease, old age.
The reproductive cycle and habits are the exact same as any other bovine that is not of the Black Angus breed. Just because a cow is an Angus, doesn't mean they're special or entirely different from other breeds.