In this discussion of what I did during the 2018 Tour de Fleece, I talk about the wool breed Zwartbles, spinning buffalo fiber on a drop spindle and finally a very rare breed of wool, Dor Galen.
The buffalo fiber was included in the Clouds of Luxury from the Etsy store Sericin
The Dor Galen fiber was purchased at a fiber festival several years ago from Sandy Ferguson's Dyed in the Wool
Dor Galen is no longer available, the horned dorset at the bottom of the above linked page is probably a good close substitute.