Intro

The world’s largest breed of ass, the American Mammoth Jack stock was developed in the U.S. through the selective cross breeding of imported European stock with local Native American and Mexican animals.

Origins

Small time breeding of these animals was done for more than 100 years prior to the development of an official registry in 1888.

This is an animal developed based on the needs of people in various areas, but mainly for agricultural & transportation needs. The intention was to create a larger & stronger animal more capable of heavy workloads.

Selective breeding helped to preserve important traits, but was often limited to what was available to use. However initially the registry attempted to standardize the breed to only include black animals a minimum of 15hands tall.

Over the years, these this rigid type lines have blurred and the breed encompasses a number of types.

Features

Jacks must be a minimum of 14.2 hands Jennets must be a minimum of 14 hands Incredibly strong

Physique

Head is well shaped & tapered to a round muzzle Large, wide-set eyes & long, upright ears Neck should be muscular but not too thick & well proportioned Good width, depth & length of body Strong loins & a full hip Legs should be strong and thick Feet are large & well cupped

Traditional Colors

Initially they were to be black with a mealy / pangare gene however cross breeding has created more colors including sorrel.

Temperament

Willing and tireless Mild mannered and kind