A cow can handle twins, but it's challenging and often requires significant human intervention, as twin pregnancies increase health risks for the mother (like difficult births, metabolic issues) and challenge her ability to nurse two calves, often leading to one being neglected; producers must monitor closely for issues like freemartinism (infertile female in mixed-sex twins) and ensure proper nutrition and care for both the cow and calves.
In cattle, it is a rare condition (3 to 5%) and depends on the genetic background and environmental factors. Twin birth is a result of multiple ovulations, being more common in dairy rather than in beef cattle. Calves could be monozygous or dizygous, with the same or of different sexes.
Independent of parity, the greatest twinning rate was observed when conception occurred from August to October compared with other seasons (OR = 1.2). Calf mortality was greater after twin births, with 28.2% of twin calving events reporting one or both calves as dead, compared with 7.2% for singleton births (OR = 6.5).
The 3-2-1 rule for newborn calves is a guideline for feeding colostrum: provide at least 3 liters (or 5-6% of body weight) of the first milk (1st milking) within the first 2 hours of birth, and repeat this feeding process about 8 hours later to ensure crucial antibody transfer for immunity. This process helps calves fight disease, as the gut's ability to absorb antibodies decreases significantly after the first few hours.
Not all twins share placental vascular connections, so not all females that are born co-twin to males will be freemartins. Additionally, a freemartin may be externally indistinguishable from a fertile female.
Care should be taken to keep inbreeding at a fairly low level by avoiding matings of brothers with sisters or parents with their offspring. Close matings within small herds or family groups not only produce rapid inbreeding buildup and, hence, depression, but can produce random losses of desirable genes.
Abortion was recorded in 23.3% (278/1194) of cows before Day 260 of pregnancy: 1.3% (7/522) in bilateral and 40.3% (271/672) in unilateral twin pregnancies. The mean date of abortions was Day 174 of gestation (range, 135–249).
You can have father-daughter matings in beef cattle, but it is not recommended. This type of breeding practice is called inbreeding or close breeding. Again, this breeding practice is rarely practiced today, although it was common in the foundation animals of most breeds.
Trivia Tidbit: A group of at least 12 cows is called a flink or, more commonly, a herd.
Cows can only produce milk, once they have given birth to a calf. Dairy cows are inseminated once a year and after a pregnancy of approximately 40 weeks, the cow gives birth to a calf.
Monochorionic-Monoamniotic (Mo-Mo)
This type of monozygotic twin pregnancy is the rarest and riskiest, where identical twins share both the placenta and amniotic sac. Studies show that this type of pregnancy is associated with a survival rate of around 70% for both.
Although a twin pregnancy could bring additional income from extra calves and it could shorten gestation length, twinning compromises milk production, increases the incidence of dystocia and perinatal mortality, decreases calf birth weight, increases the incidence of metabolic diseases, decreases fertility, increases ...
In about 2/3 of the MZT cases, the splitting occurs 4-8 days after fertilization, and the placenta will be monochorionic-diamniotic (i.e one placenta and two amniotic sacs).
In cows, this is called dizygous twins, in humans we call this fraternal twins. Less than 10% of cattle twins are monozygous, or "identical" twins. So even if you have two female or two male calves that look the same, odds are they probably aren't identical twins.
If an ultrasound exam is carried out early enough in gestation, twins can be detected. This may help in identifying a potential twin birth when the cow is first going into labour and may provide the producer with an indicator to check for a second calf during delivery.
Cows are highly social animals with complex emotional lives, and research shows that they form close friendships within their herd. These preferred companions are not random; cows repeatedly choose to graze, rest, and groom alongside specific individuals.
A group of cows is called a herd.
Cattle is the collective noun for cows and bulls. A group of cows is called a kine, and a group of cattle is called a herd. And a group of 12 cows is called a flink. Other ways to refer to cattle include drove, yoke, team, and fold.
Dogs absolutely will breed with their children/parents, siblings, etc. They have no concept of genetics and there is no biological process that would stop them.
Inbreeding avoidance mechanisms have evolved in response to selection against inbred offspring. Inbreeding avoidance occurs in nature by at least four mechanisms: kin recognition, dispersal, extra-pair/extra-group copulations, and delayed maturation/reproductive suppression.
Hence during its lifetime, a cow can give birth to several calves, but it tends to be approximately one calf per year. Generally speaking, most cows have their last calf when they are about 10 years of age.
It sounds impossible, but the longest recorded time between the birth of twins is 87 days. One twin was born early, and doctors managed to delay the second birth to give the other baby more time to grow. It's one of those rare medical miracles where timing really did mean everything—and both babies made it.
“Also, female cattle nursing twin calves will require an estimated 13% more energy intake to maintain body condition,” Zook said. “The additional suckling pressure on the cow will extend the post-calving anestrus period. Therefore, cows nursing twins will take longer to rebreed for next year's calf crop.”