This depends on the breed. Some calves will weigh around 750 lbs or lighter at 8 months of age; others may weigh around 900 lbs.
Most Angus cows are already past this age--they are mature female bovines that have already had a calf and are past 2 years of age.
Young heifers, as in heifers that are younger than 6 months of age, should NEVER be bred to calf, as this is much too young for them and too hard on their growing bodies. The youngest a heifer can be bred at is when they are 15 months old. Most heifers reach puberty by the time they are 11 or 12 months old, but shouldn't be bred until they are either 60% or 70% of the average weight of the main cowherd, or reach 15 months of age. Most of the time it is the weight that many cattle producers rely on for best calf production of the heifers, as sometimes a heifer that reaches 15 months of age is still too small to be bred.
A Holstein bull calf can be around 12 months of age to be able to breed.
6 months...
This all depends on the age that the calf was weaned and its breeding. Sex is irrelevant for this question, though heifers tend to weigh around 25 to 30 lbs less than bull or steer calves. British beef calves can weigh around 500 to 600 lbs when they are weaned around 6 months of age; when weaned at around 10 months of age, they can weigh around 750 to 800 lbs. Continentals on the other hand, will weigh around 700 to 750 at 6 months of age, and up to 900 lbs if they aren't weaned until they're around 10 months of age. Beef calves that are weaned earlier will weigh less than those that are weaned between 6 and 10 months of age. Dairy calves, which are weaned off the bottle or bucket, are often lighter. Holstein and Brown Swiss calves, when weaned at 3 months of age, will weigh around 200-275 lbs; Jersey calves weaned at the same age will more often weigh only 150 to 200 lbs. Remember thus: The smaller the calf, the lighter the weights. The earlier the calf is weaned, the lighter the calf will weight. And vice versa for both.
A baby calf is just that: a baby, not an animal that is able to breed yet. Calves are only able to breed by the time they are around 15 months of age, and at that age they have lost their calf stage.
When it is no longer a calf, which is around 24 months of age.
That all depends on the age and weight of the calf. Typically a calf should recieve 10% of its body weight in milk replacer per day.
Usually about 6 months, when they are between 500-700 pounds.
Most Angus cows are already past this age--they are mature female bovines that have already had a calf and are past 2 years of age.
The human baby. A human baby depends on his/her parents for 16 to 18 years. By contrast, a calf depends on its mother for 8 months of its life, and a puppy will stay with its mom for a year or so, even though weaning age is around 6 weeks.
On average, infants double their birth weight at approximately 5 to 6 months of age. This can vary depending on factors such as birth weight and overall growth rate.
Young heifers, as in heifers that are younger than 6 months of age, should NEVER be bred to calf, as this is much too young for them and too hard on their growing bodies. The youngest a heifer can be bred at is when they are 15 months old. Most heifers reach puberty by the time they are 11 or 12 months old, but shouldn't be bred until they are either 60% or 70% of the average weight of the main cowherd, or reach 15 months of age. Most of the time it is the weight that many cattle producers rely on for best calf production of the heifers, as sometimes a heifer that reaches 15 months of age is still too small to be bred.
It is a young calf usually a dairy bull calf that is slaughtered usually around 2 months of age.
A Holstein bull calf can be around 12 months of age to be able to breed.
A baby bull calf looks just like a normal calf, except there is a more pronounced navel than what would be found in a heifer calf. And, yes, they are very cute. But remember, they grow up to be big, intimidating bulls that shouldn't be messed around with, even when they're babies.
About 18 to 24 months. Calf is on his mother for 6 to 10 months, then backgrounded for a few months to a year, then in the feedlot for a further few more months before slaughtered.