Heifers will show their first heat around the age of one year, depending on the heifer.
There's not really an answer... You just call it a cow...
This depends on the cow and what the cow is feeling. Mothers or calves that have been freshly weaned from each other will call (or moo) constantly for about a week. Females that are in heat may call more frequently throughout the day.
The Boss Cow, Lead Cow, or Top Cow.
No. A cow or heifer in heat will stay with the herd, or rather, the herd will stick with her.
Momma cow.
Just a cow.
every cow moos
I believe you would call it a "heifer".
They call him/her a calf.
A cow shed. A cow shed is called a BYRE
A grazing cow or grazer.
An open or barren cow.