| It takes at least five generations to reach British Guernsey. This ladder describes the fastest way: | |
| IR--Identification Register | Standard-sized female with erect ears (0%) |
| SR--Supplementary Register | Female with a Golden or British Guernsey sire (50%) |
| FB--Foundation Book | Female out of an SR doe with a Golden or British Guernsey Sire (75%) |
| HB1--Herd Book 1 | Female out of an FB doe with a Golden or British Guernsey Sire (87.5%) |
| HB2--Herd Book 2 | Male or female out of an HB1 doe with a Golden or British Guernsey Sire (93.75%) |
| BG--British Guernsey | Male or female out of an HB2 doe with a Golden or British Guernsey Sire (96.875%) |