Whether breeders are looking for sheep to add to their herds, or advertising them for sale, the percentage of actual Gotland genetics is a trait always indicated. The Gotland breed is uncommon in North America, so artificial insemination is used to improve each generation's percentage of Gotland genetics. The goal is to develop the breed here as closely as possible to the real deal - the Swedish Gotland.
Over generations of upbreeding, US breeders are now achieving into the 80th and 90th percentiles of pure Gotland genetics - significant enough that the percentages are calculated out to hundredths, and beyond! Bloodlines are also traced back to countries they're sourced from, such as Sweden, New Zealand, and the UK. Each country and foundation breed contributes unique characteristics.