Sheep need certain trace minerals in their diet to thrive. You can give them minerals via a salt block purchased at a feed store, but we’re always trying to find ways to farm sustainably on St. Croix without importing things on big diesel-powered container ships.
On an online sheep forum we came across a shepherd in Maine who gives his sheep fresh seaweed from the beach. So we collected an assortment of wet and dry seaweeds from our local strand, and what do you know? The girls loved it!