Mammoth Jack Donkey

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Scientific name: Equus africanus asinus

Other common names: Mammoth Jackstock; Mammoth Donkey; Jack Stock; American Mammoth Jackstock; American Mammoth Donkey

The basics:
Considered the world’s largest breed of Donkey, the Mammoth Jack Stock was developed in the United States to sire Mules (a cross of horses and donkeys) and breed large, strong, and viable animals for draft and transportation. Selective crossbreeding of large European and Spanish breeds (such as the Andalusian, Catalonian, Maltese, and Poitou) with native American and Mexican breeds gave rise to the modern Mammoth Jack Donkey.

The American Mammoth Jackstock Registry was created in 1888 to standardize the breed.

Appearance / health:
According to the American Mammoth Jackstock Registry, "Jacks a minimum of 14.2 hands (58") tall and jennets a minimum of 14 hands (56"), plus girth and cannon bone measurements that meet the requirements, are eligible for registration, as they were when the registry was created in 1888. Animals in these size ranges represent a significant number of the Jack Stock population. However, the model jack 200 years ago, and today, would be no less than 15 hands (60") tall. He should have good width, depth and length of body, a strong loin and full hip. The neck should be well muscled, but not excessively thick, and of proportionate length. The feet should be large and well cupped. Bone should be of good size, flat and clean. The legs should not be fine in appearance, resembling the leg of the Thoroughbred horse. The head should be well shaped and not of extreme length or thickness, tapering to a relatively fine, rounded muzzle, and be in good proportion to the body, with large wide set eyes, and well placed long, thin upright ears."

A donkey’s health is dependent on its habitat and nutrition. They are typically hardy and resilient but can suffer from health problems if overfed. Vaccinations, de-worming medications, and hoof care are essential in keeping the donkey clean and healthy. The care and monitoring of a veterinarian is recommended.

Behavior / temperament:
Donkeys have become popular as pets and companion animals, even as guard animals because of their high intelligence. They became notorious for being stubborn, although this stubbornness is said to be the result of their strong sense of self-preservation –- no one can force them to do something they perceive as a threat to their survival, especially going into water.

Mammoth Jack Donkeys were used as work animals in the agricultural and transportation industries. Today, they are also raised for shows, riding, and companionship. They are calm and good-natured, but will kick and bite when threatened.

Housing / diet:
Donkeys are grazing animals and require pasture for food and fresh air. The recommended pasture area is an acre per donkey per month. Mammoth Jacks require slightly larger areas. A barn or similar enclosure must be available to shelter them from harsh climates. Donkeys do not like rain and snow because they easily chill and become susceptible to disease.

Donkeys are native to sparse deserts, therefore they require vegetation that is low in protein and high in fiber such as Timothy Hay or Bermuda Hay. A salt block should always be available for mineral supplements. Clean fresh water should also be available at all times. Treats like bite-size carrots can be offered sparingly. Donkeys enjoy eating and if allowed to self-feed will become obese and susceptible to various health risks.


nature sweet, personalities mammoth jennets, outstanding riding mules


training, tricky, obedient donkey


true wither donkeys, Horse training techniques, Several Breed Registries

Mammoth Jack Donkey Health Tip

Mammoth Jack Donkey

www.yahoogroups.com, have been established to help first time donkey owners face challenges that are unique to the breed. Answering questions like, “What do I feed my donkey?” will generate a host of responses.

The Ass which is the correct term for donkey, burro or Jackstock has its own branch on the equine family tree. There are many differences between donkeys and their horse cousins. Their vocal qualities for instance, that base tone Aw-EE, Aw-EE bray is one of several forms of communication. The length of the ear on a Mammoth can reach almost two feet is an easily recognized characteristic trait. Their massive head blends into a strong neck. Lacking a true wither donkeys have a straighter back and a little different shape to the croup and rump, minus the heavy muscling found in a horse. The tail has a tasseled switch on the end and shorter hair. The mane’s are often clipped short as the hair is too stiff and upright to lie over. Mammoth Donkeys need good bone to their legs and will have more of an upright pastern angle with enough hoof to stay in a good relationship with their body. When looking at the conformation of a Mammoth Donkey you should be able to see a balance with good proportion of leg and neck to back and body.

Several Breed Registries are available in the United States. The popular ADMS, American Donkey and Mule Society, was established in 1967 as a National Breed Society and have successfully recorded the pedigree history of the breed and a database of information. They publish, The Brayer, a bi monthly magazine and maintain a catalog available to the public of long ear books and reference material. You will find www.lovelongears.com is an excellent source of information regarding Donkeys, Mules and Zebras.

The records indicate Mammoth Jacks were imported from Spain and other European countries to the United States as early as 1785 to produce working draft mules. Today you’ll find some larger donkeys have developed a lighter bone quality especially useful in breeding mules that are quickly gaining in popularity. Once in awhile you will even find Mammoth Donkeys that have a single foot gaiting action being bred to gaited horses for outstanding riding mules. Mammoth Jacks not being used in a managed breeding program should be gelded and allowed to become productive members of society as they are NOT suitable as pets and can become dangerous.

Why a Mammoth Donkey? Why NOT! They have tons of personality are terrific hard working animals and LOVE attention! Your investment is likely to turn into a lifelong friend. Beware! When stuck with Donkey-Fever watch out... you’ll soon be in the market for a second one!

Kristi Kingma ^..^

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North Central Idaho, USA


From Teamdonk Oct 17 2010 1:15PM


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