What was the name for the trend of raising fences or hedges to farm sheep?

The practice was known as "enclosure."

The name for the trend of raising fences or hedges to farm sheep is called "enclosure." Enclosure refers to the process of enclosing or enclosing land, typically by erecting fences or hedges, to create separate pasture areas for grazing livestock such as sheep. This practice began in England during the 16th century and gained popularity during the 18th and 19th centuries. Enclosure aimed to improve agricultural productivity by consolidating small strips of land into larger, more efficient fields that could be managed more effectively. It also helped prevent livestock from wandering off and protected crops from being damaged by animals.

The trend of raising fences or hedges to farm sheep is commonly referred to as "enclosure."