Typically a baby male or female donkey is called a foal.A foal is usually under 1 year old. Young male donkeys can either be referred to as a 'baby jack' or a male foal. A young female donkey can be...
A Male Donkey is a Jack and a Female Donkey is a JennyA male is called a 'Jack' and a female a 'Jenny'
a jack or jackass
A Colt or a Foal
If the baby is a male is called a colt, and female is known as a filly. As they age they will be known as Jacks (male) and Jennies (female).