In Australia, lambs are born in winter (June-July) primarily to time their growth with the spring pasture boom, maximizing nutrition when grass grows fastest, which reduces feed costs and allows for rapid weight gain before market, though farmers provide shelter to protect vulnerable newborns from cold and predators. This strategic timing ensures lambs are ready for weaning and sale during peak grass growth, hitting market demand when they're plump and heavy.
Most often lambs are deliberately born in winter in Australia so that they can take advantage of the fertile pastures that come in spring. While this may work well with other practices on farms, it subjects these vulnerable lambs to the harshest of conditions.
In January and February ewes (female mother sheep) become pregnant. The gestational period for sheep is five months. Lambs conceived in January and February will be born in June and July of the same year. In Australia, lamb is considered a summer dish.
Although sheep are naturally hardy creatures, a newborn lamb is susceptible to the cold, and so most breeds only come into season when the days start to get short – in time to give birth in the spring.
Lambs are born around 145 days after the ewe falls pregnant. Lambing can start as early as December and go on to as late as June. Lambing can take place indoors or outdoors. Often first-time mums will be brought inside so farmers can give them a hand if needs be.
It takes five months for a lamb to fully grow and develop inside a ewe, so almost all of the lambs are born in February and early March. Ewes typically have twin lambs, but can also have singles, triplets, and occasionally quadruplets.
Pregnant women who come into close contact with sheep during lambing or other farm animals that are giving birth may risk their own health, and that of their unborn child, from infections that such animals can carry.
In the spring, shearing begins when the weather becomes warm and the wool on the sheep, as they say, "comes right". By this time, the wool of coarse-wool and semi-coarse-wool breeds has become loose, i.e. the connection between the wool and the skin is weakened.
For the majority of the United Kingdom lambing season begins in early spring, but can start as early as December, depending on the breed and location. Lots of ewes give birth to their lambs without any issue in the fields.
Autumn lamb becomes available after Spring lamb during the period from July to January until 11 months old.
Hogget is a sheep between one- and two-years-old. Mutton is two years plus in age, and lambs usually are around 6 months to 1 year.
Watch for signs of hypothermia
“A temperature below 100 degrees Fahrenheit is considered hypothermic,” says Olson. “Feed warm colostrum or milk replacer to increase a hypothermic lamb's body temperature.” You can also warm lambs by placing them in a warming box until their temperature reaches 101 degrees Fahrenheit.
With adequate nutrition, sheep are fertile throughout the year. A healthy, well fed ewe can give birth up to 6 or more lambs in two years. Climate, diseases, environmental stresses, management and nutrition have an impact on fertility. (b) as a consequence of malnutrition or undernutrition.
Studies indicate that up to 50% of the lambs born can die, mainly due to diseases and other causes such as adaptation failure, dystocia, cold stress, starvation, and mismothering [19].
Sheep Need Their Wool This Winter – You Don't
Traditionally, many Australian farmers have shorn in the autumn before their winter and spring lambing, in the hope of obtaining thicker wool, which means increased profit – but sheep are growing that wool to protect themselves from cooler temperatures.
It is generally not recommended that pasture-reared lambs be weaned before they are 90 days old, preferably 120 days. The size of the lamb at weaning is generally more important than its actual age. As a rule of thumb, most lambs can be weaned at 60 days of age or 45 pounds, whichever comes first.
Lambs are very susceptible to cold stress, illness, and predation, and lambing in winter only increases the mortality rates. Farmers are also selectively breeding sheep to make them give birth to more than one lamb. A 2019 study found that the mortality rate increases with twins and triplets.
The wool and meat industry practices winter lambing in order to produce the most lambs for the lowest cost. Sheep are impregnated to give birth in winter so that pastures are most fertile when their lambs are weaned in spring, allowing surviving lambs to grow fatter faster. This method of breeding reduces feed costs.
The prevalence of perinatal mortality in many sheep raising areas is very high and of the order of 25-80%. Well managed flocks can have less than 5% perinatal mortality.
Wild sheep (and certain types of “hair” breeds like the Katahdin) will naturally shed their coarse winter coats. They do this by scratching their bodies against trees and rubbing away their extra fluff as the weather warms up.
Sheep should be shorn at least once a year to help maintain flock health, and to pro- duce higher quality wool. There isn't a set time of the year when you should shear; however, there are a few guidelines that may be helpful in determining the best time for your flock. 1.
Advances in breeding techniques have allowed producers to select breeds and genetics of sheep that are less tied to natural seasonal cycles. Traditionally, ewes (female sheep) have a natural reproductive cycle that leads them to lamb in the spring, when temperatures are warmer and feed is more abundant.
4. Raw or undercooked meat. Raw or undercooked meat should be avoided during pregnancy due to the risk of toxoplasmosis, an infection with bacteria often found in raw meat, as well as sheep, lamb and cat feces.
Some possible reasons for lamb rejection: lamb has something wrong with it. ewe doesn't have enough milk for the number of lambs she has.
gondii parasite is sometimes found in the afterbirth or on newborn lambs. As a result, there's a small risk of toxoplasmosis infection passing from sheep to people during lambing season. People most at risk include: pregnant women who can pass congenital toxoplasmosis on to their unborn child.