Buzzsaw Ranch - A newly developing herd of quality Mammoth Jackstock. Adult animals are used for riding therapy pleasure riding and packing as well as much loved family pets. Located in Medford Wisconsin USA.

Precious Stone Ranch - Stands to outside mares the triple registered black Mammoth Jack donkey DIAMOND REO. Proven liver-cover frozen semen and fresh-cooled artificial insemination sire.

The Lazy L Ranch - Breeder who hand-raises healthy and happy ADMS and ACOSA registered Standard Donkeys. Located in Alvord Texas USA.

Walk-A-Bout Acres - Breeders of mammoth jackstock and an occasional mule. Offering 2 mammoth jacks at stud. Located in the beautiful Bitteroot Valley of Florence MT USA.

West Farm Mules & Mammoth Donkeys - Breeders of show quality halter and performance mules and mammoth donkey jackstock. Specializing in breeding for mules with color Buckskins Duns and Blacks. Located in Las Vegas Nevada.