However, you can try the following to encourage your foal to rest:
* Feed your foal: A well-fed foal might be more likely to rest.
* Put it in its stable: Foals often sleep in their stalls. This might encourage it to lie down.
* Play with it gently: Sometimes, after playing, a foal might get tired and lie down.
Keep in mind that the game's AI is limited, and you may not be able to directly force your foal to lie down.