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American Mammoth is the largest breed of ass and was developed through the need for larger & stronger animals in the US.
How It Happened
Breeding began by the selective crossing of imported European breeds to local Native American & Mexican animals.
Informal breeding of the mammoth began more than 100 years before they became official.
A registry was formed in 1888 to track and register the animals & originally close attention was paid to bloodlines. The intention was to preserve desired traits and produce black animals over 15 hands tall.
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Standards Change
As their popularity for agriculture and transportation animals grew, their bloodlines became more & more diluted.
Different geographical areas had different requirements and often breeding was limited to available local stock.
Today the registry accepts a much wider variety of animals as new breeds are introduced. More recently Belgium Draft blood has been introduced which has created a number of heavier sorrel animals.
Learn More
American Mammoth Jackstock Registry
American Livestock Breeds Conservancy