"September brings réttir—the nationwide roundup where people on foot, ATVs or Icelandic horses retrieve their stock from the mountains and valleys, aided by trusty sheepdogs. The grueling endeavor sometimes requires days in the saddle, and entire communities turn out in support." From: celebrating-rettir.
This is Réttir in Iceland, the transhumance process of moving sheep from their summer grazing grounds to their winter shelters. There are no Livestock Guardian Dogs needed, as the only lamb predator in Iceland would be the Arctic_fox, which generally eats smaller mammals, eggs, birds and plants. In spite of there being no LGDs in this country, I'm including this for educational purposes.