When crossed with any ewe, the Bluefaced Leicester produces the famous Mule. The majority of the cross-bred ewes in the UK are sired by the Bluefaced Leicester.

Mule flocks have recently shown to be the most profitable commercial sheep enterprise.

The prolificacy, milkiness and conformation passed on to the Mule ewe from the Bluefaced Leicester makes her the perfect prime lamb producer, when put to any sire.