Foal
A foal is a young or baby horse under the age of 4 years old. A male foal can be called a colt and a female foal can be called a filly. Once the filly is over 4 years old it is then called a mare and a colt is called a stallion. A colt can be castrated and then when it is 4 years old, it would be called a gelding.

Healthy foals grow fast and can put on three pounds or over a kilo a day. A sound diet improves growth and leads to a healthier adults animal though genetics also plays a part. In the first weeks of life the foal gets everything it needs from the mare's milk. It gets nourishment and also antibodies from Colostrums. The mare needs plenty of water to help her produce milk for the foal and may benefit from a supplementary feed.

From ten days of age a foal may start to eat solids such as hay, grass, and grain. After eight to ten weeks it may need supplementary feeding as well as milk.

A foal can stand up within the first hour after it is born and can gallop (run) usually the next day.