It depends on the breed and weight of the heifer, but I have seen Holsteins as young as 6 months in heat. However, this is not a recommended age to begin breeding.
An Angus cow is able to breed anytime she is not pregnant and in heat.
Around 2 years or 24 months of age after they have had their first calf.
Given the usual conditions : intact female, fertile age, in heat, gets to mate with an intact male - sure.
Holstein cows can die at any age. Really, they can. Any age means from 2 to 20 years of age.
Cows can range from 2 to 20 years of age or older.
The "life stages" are heifer calf, then heifer, then cow. Cows become cows when they give birth to a calf at around two years of age, however most producers simply like to call those females first-calf heifers or first-calvers rather than cows. Some won't call cows cows until they've had their second calf.
The usual age is 13.
The average age for a first heat cycle is around 6 months of age. Although, larger breeds can have their first heat stage as late as 18 mths.
What is the retirement age for someone born in 1954.
It depends on her age and size when she has her first 'heat' normally it is best to wait until she is 10 to 12 months old.
Cows aren't cows if they're only 9 months old. You would be talking about a heifer, not a cow. And yes, a heifer can quite possibly get bred at 9 months of age, especially if she had been showing heat signs before she was weaned.
The usual age is 13.