Music video by Enrique Iglesias performing Tonight (I'm Lovin' You). (C) 2011 Universal International Music B.V. 1  Music.
Some people think a baby horse is called a pony. In fact, a baby horse is called a foal. A foal is a horse that is younger than one year old. A pony can be any age! Ponies have short legs and wider bodies than full-sized horses. Ponies often have thicker manes too! People can ride ponies, just like they can ride full-sized horses.
There are many more terms used to describe male horses than females because they not only indicate the gender and age of the horse but can also reveal whether they are fathers, if they've been castrated or not and if they have developed and matured properly. Colts are those male horses who are less than 4 years old. When they turn 4, male horses become stallions -- unless they are castrated. Male horses who are altered are referred to as geldings. If a horse has fathered a baby, he's called a sire. Another term used to describe male horses is rig, which refers to a male horse who either hasn't been castrated properly or has one or two undescended testicles.