Yes, if they're not pregnant.
A barren cow is another name for an open cow or heifer. Barren cows are cows that are not pregnant.
Angus cows or heifers come into heat every 21 days.
Only if the cow that they're mounting is in heat.
No. Toast is bread that has been exposed to heat to be toasted. Toast and bread have nothing to do with cows, and the making of bread also has nothing to do with cows and does not come from cows at all.
Yes, possibly.
With dairy cows, yes. Other times cows (including beef cows) will moo when they are calling to their calves, or when it's feeding time, or even when they're in heat.
If she's in heat, most definitely. Often a bull will go look for the cow that is in heat, no matter if he's the neighbor's bull or not.
Cows are not extinct. I ate a hamburger yesterday.
no
cows now go away
No, cows do not go on dates in the same way that humans do. Cows are social animals that form bonds within their herd, but they do not engage in dating or courtship rituals.
Cows will show signs of heat cycle (they will bellow, they will mount or stand for mounting), the bull will smell that she is in heat (often the cow will urinate and the bull will smell the urine-this is referred to as the Phleaman response). They will then breed.