Herd in Iceland is a documentary about the annual round-up of the Icelandic horse, isolated for centuries by the country's oceanic borders.Herd in Iceland is a documentary about the annual round-up of the Icelandic horse, isolated for centuries by the country's oceanic borders.Herd in Iceland is a documentary about the annual round-up of the Icelandic horse, isolated for centuries by the country's oceanic borders.