American Mammoth Jackstock Registry
Former Standard Jack & Jennet Registry of America - SJJR


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AMJR Registration

Registration of Jack Stock is vital to preserving the integrity of this unique breed.

"It is absolutely necessary for the Jack Stock to have their own registry for them to get the recognition in the show ring and the world market.  We have been running the risk for a long time of becoming a large donkey."
Gail Flach, Coffee Hollow Jackstock, 2003


Mammoth Jack Stock jacks, jennets and geldings meeting the criteria outlined in the Rules of Entry are eligible to be entered in the AMJR Stud Book. Animals registered before maturity, are issued a certificate that includes no measurements, and is considered to be a temporary registry entry. A registry update is required to be submitted when the animal reaches maturity (typically at five years of age). Upon receipt of the update, and verification by the AMJR Registrar that the animal meets the registry requirements, a permanent certificate of registry is issued.

Benefits of AMJR Registration

bulletCertified pedigrees are an effective, and necessary tool in the management of a responsible breeding program.
bulletWith Stud Books dating back to 1888, AMJR can provide the most extensive pedigree information available for Jack Stock.
bulletAffordable DNA typing and parentage testing to insure the accuracy of pedigrees.
bulletEnjoy free promotion through AMJR as a breeder of AMJR registered Jack Stock, or mules sired by AMJR registered jacks.
bulletMeet the demands of today's discriminating buyers who recognize the added value of registered Jack Stock.

Application To Registry

Print Application (requires Adobe Acrobat Reader 5.0 or higher)

Print Rules of Entry (requires Adobe Acrobat Reader 5.0 or higher)

Print breeding certificate (requires Adobe Acrobat Reader 5.0 or higher)

  Click icon to download Acrobat Reader FREE  


To request forms be mailed to you:

Select the forms you need and enter your contact information.

Send Registration Application
Send Breeder Certificate

Mailing Address

[Registration] [Reg. Transfer] [Reg. Update]

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Last modified: 08/05/2014