Why do some sheep breeds require more shearing than others?

Coat Type and Shearing Frequency

The Merino breed, known for its fine wool, requires shearing at least once a year to prevent wool overgrowth and heat stress. In contrast, the Rambouillet breed has a medium-coarse coat and may only need shearing every 18 months. The Dorset breed, with its medium-fine coat, typically requires shearing every 12-14 months.

Breeding Objectives and Shearing Schedule

Sheep breeders often prioritize traits that influence shearing frequency, such as fleece weight, fineness, and quality. For example, a breeder seeking to produce wool for high-quality textiles may prioritize the Merino breed and plan for more frequent shearing. Conversely, a breeder prioritizing meat production may prefer breeds like the Dorset, which require less frequent shearing.

Rotational Grazing and Shearing Implications

Rotational grazing systems can impact shearing frequency due to varying pasture quality and quantity. For example, a breeder using a rotational grazing system with high-quality pastures may be able to extend shearing intervals for certain breeds. However, poor pasture conditions or overgrazing can necessitate more frequent shearing to maintain animal health and prevent heat stress.