From birth, a calf will constantly need milk from the cow for 2 to 3 months. By the time they are old enough to eat on their own, they are fully weaned from their mothers by the time they are 6 to 10 months old.
is it an hour
At first, a newborn calf may nurse once every hour or two.
In the story "Old Yeller", the heifer wouldn't nurse her calf because she was afflicted with "hydrophobia," better known today as rabies.
Probably, if the calf doesn't pull the cow down before then.
Within a few minutes to an hour or two after birth. The sooner a calf nurses, the better.
Calf milk poweder is for baby cows that, for some reason, can not nurse from there mother. Calf milk powder is the same to a cow as formula is to an infant.
There is no fixed time that a baby giraffe stays with its mother. The calf may nurse for a month or for as long as a year, because they usually find food on their own. Giraffes often engage in calf groupings, or nursery herds, where a mother will leave her calf with other giraffe mothers while foraging.
A calf's first teeth often erupts in the womb a week or a few days before birth. These milk teeth are often seen to help a calf nurse.
Only if a long time has passed since the calf was weaned or the calf will nurse again. Usually, once at least 6 weeks have passed, can you put a cow and calf back together again.
That depends on the breed and birthweight of the calf. Every calf is different, and have different lengths. On average, though, a calf may be about three to four feet long from the tip of the nose to the tip of the tail.
A 3 day old calf should be nursed 3-5 times a day depending on its size and strength.
Almost immediately if that's the purpose of the calf--for meat and not breeding.