Not quite; they have to give birth to a calf in order to lactate.
No. Cows can be open and still be able to lactate. They must have GIVEN BIRTH to a calf in order to be able to lactate.
No. Heifers, being young female cattle, don't lactate until after they've had their first calf, which is typically at 24 months of age. A heifer remains a heifer, from birth, until she's had her first or second calf, whereby she is considered a cow. But until then, heifers don't lactate like cows do, and when they do lactate after birthing a calf, they typically produce less milk than their older counterparts.
No, cows must be delivered of a calf in order to lactate, or produce milk. Most large dairy farms will remove the calf from the cow right after birth and give it milk replacer, and this will allow the cow to be milked to maximum.
No, cows continue to lactate after giving birth (between pregnancies). Many cows are 'dried off' (where they stop lactating) during the later stage of pregnancy before she gives birth again.
Female whales are called cows. The calf is a calf.
A cow's baby is called a calf.
calf
Cows will produce milk for as long as a producer (dairy or beef) needs to have them produce milk, whether it's a time frame of around 6 to 10 months or longer, depending on their type and class of the cows and the producer's management criteria. The time frame, on average, is between or either 6 to 10 months.Dairy cows tend to be milked longer than beef cows due to the fact that they're selected to produce milk, not raise a calf. Beef cows will produce milk as long as they have a calf on them.
A calf doesn't grow in a mother cow's stomach. It grows in her womb or uterus. And cows are fully capable of being able to lactate (give milk) while a fetus is growing in her womb, and it's always to feed the last calf she gave birth to. A cow, however, will eventually stop milk production when her calf is weaned from her several months before she gives birth to her next calf.
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.
It depends. Is she a beef cow or dairy cow? Are you wanting to keep the cow with the calf or separating the calf from the cow? Usually with beef cows you don't bother with milking them unless you have to because the calf isn't up and suckling soon after birth and you want to encourage the calf to be up and suckling, or to get some milk from a cow or heifer that won't accept her calf right away to feed that calf with. With dairy cows, though, if you've separated the calf from the cow right away, it's ideal to milk that cow to collect the colostrum to feed that calf--and other calves--to the benefit of the calf's health. But, if you are wanting to keep the calf with the cow for a couple of days, then no, it's not necessary.