When should you stop riding a horse when it is foal?

You should never ride a foal.

Foals are baby horses, and their bones and muscles are still developing. Riding a foal would be extremely harmful and could cause serious injury.

Instead of riding, focus on:

* Bonding and handling: Spending time with the foal, getting it used to human touch and handling.

* Groundwork: Teaching the foal basic commands like leading and standing still.

* Socialization: Exposing the foal to different people, animals, and environments.

Once the foal is older and stronger (usually around 2-3 years old), you can start introducing them to riding with the guidance of an experienced horse trainer.

Remember, patience and proper training are key to raising a healthy and happy horse.