Wisconsin Donkey & Mule Society
ABOUT MULES & DONKEYS

Definitions

Burro
Small members of the ass family from Mexican and Spanish stock.
Donkey
Nickname for members of the ass family (Equus asinus)
Donkey sizes
Miniature: < 36"
Standard: 36+"-48"
Lg standard: 48+"-56"
Mammoth: > 56"

Height at the withers when fully grown.

Hands high
1 hand = 4 inches.
Traditional height measurement unit for equine, taken at the withers
Hinny
Cross between a male horse (stallion) and a female donkey (jenny)
Hybrid
Result of breeding animals of different species. Horse + Donkey = Mule or Hinny.
These hybrids are sterile and cannot reproduce because the horse has 64 chromosomes and the donkey has 62.
Jack or Jackass
The male of the ass family
Jennet orJenny
Female of the ass family
John or Horse mule
Common term for adult male mule
Mare
Adult female horse
Molly or Mare mule
Common term for adult female mule
Mule
Cross between a male donkey (jack) and a female horse (mare)
Stallion
Adult male horse
Withers
The prominent ridge where the neck and the back join. Height is measured vertically from the withers to the ground. Donkeys and mules usually don't have much withers.