Great news!

[timelets]

And the sheep certainly have adapted. Since 1832, when the islanders decided to build the 2m-high dyke to keep the sheep from pasture they needed for cows, the flock's diet has been restricted to seaweed foraged from the shore. They are one of only two groups of animals on Earth that exist purely on seaweed; the other is a marine iguana which lives in the Galapagos Islands.

"And the lambs have a pretty good life - we don't send them for slaughter until they're three or four years old."

https://www.bbc.com/news/stories-50856275