Here's a breakdown of horse ages on Howrse:
* Foal: 0-1 year old
* Yearling: 1-2 years old
* Young Horse: 2-4 years old
* Adult: 4 years old and up
Keep in mind that a horse's age on Howrse is determined by its birthday, not by its real-world age. So, if you create a horse on Howrse that is born in January of 2023, it will turn 1 year old on January 1, 2024, regardless of when you actually created it.