子こ馬うま

noun

small horse; pony

Refers to a horse of small stature, including ponies. Not necessarily a young horse.

• あの牧ぼく場じょうには子こ馬うまが何なん頭とうもいる。

  There are several small horses at that farm.

noun

foal; colt; filly

Specifically a young horse, typically under one year old. Colt is male, filly is female.

• 春はるに生うまれた子こ馬うまが元げん気きに走はしり回まわっている。

  The foal born in spring is running around energetically.