Shearing before lambing can help improve lamb growth and survival in sheep operations.
Shearing ewes before lambing is a common farm practice. It is usually done for wool management and to keep animals clean. It also helps newborn lambs find the udder quickly. Recent studies show that shearing can also improve lamb birth weight and early growth.
The timing of shearing plays an important role according to recent research in the United States by Mara Johnson, South Dakota State University Graduate Research Assistant. The best results are seen when ewes are shorn between 50 and 90 days of pregnancy. During this stage, the placenta is developing. The placenta helps deliver nutrients and oxygen to the growing lamb. If shearing is done during this period, it may support better fetal growth.
Shearing causes a short period of cold exposure and mild stress. This can increase the ewe’s metabolism. As a result, more nutrients may be directed to the placenta. This helps improve nutrient flow to the lamb. Hormonal changes and better blood vessel development in the placenta may also support growth.
Farmers must take care when shearing pregnant ewes. Low-stress handling is important. After shearing, ewes need shelter, especially in cold or wet weather. Good nutrition is also necessary to meet higher energy needs. Shearing should be done at least 30 days before lambing to avoid health risks.
Overall, shearing during mid-pregnancy can help improve lamb birth weight and survival. When combined with proper feeding and care, it becomes a useful management tool for sheep producers.