It depends on the gender and your idea of young horse.
A baby female horse is called a filly until she turns 4 years old and then becomes a mare.
A baby male horse is called a colt until he turns 4 years old and then becomes a stallion.
Sometimes people called their horse a yearling when their horse turn a year old. A yearling could be a male or female.
Pony.
Filly
a young horse is a foal but this can also be separated into male: colt and female: fillybaby horse that is five years or less: foalmale baby horse: coltfemale baby horse: filly What_is_a_young_horse_called
A young horse is a foal; a young female horse is a filly.
Male horse = stallion Female horse = mare Young horse = foal Young (older) female horse = filly
filly
equus ferrus caballus
Some popular horse magazines are Equus, Horse Illustrated, Young Rider and many more that I can't name.
Filly is a young female horse, but it has no other form. A colt is used to describe a young male horse.
A colt or young horse is a baby horse.
Dark horse Young hickory
His name was Dan who died in a horse accident when Nikola was a young boy.