Thread:MapiyaH/@comment-44117874-20200330080917/@comment-38439752-20200331144020

Horse stall is always better. A second foal stall will only become useful after you are breeding G5+ horses, that take longer time to breed and days in the foal stall to get the bonus stats. You will also have to level up the second foal stall exactly the same way the story is telling you to level up the first foal stall, so it's a massive resource sink.

If you're not keeping the horse, then sell it without training (unless you need to train and sell one for a story goal). The higher sell value of a trained horse won't make up for the resources and silver used in training.