How to steal a horse
While roaming around villages and the countryside, you might stumble upon stables that have a horse or two. These mares can be stolen just by riding on them. Naturally, this is considered a crime, so make sure you don’t get spotted by townsfolk and guards. However, if you’re fast enough, you can just gallop past them to safety.
Here’s the kicker: Stolen horses may disappear due to a variety of reasons. For instance, we were riding a stolen horse while tackling a mission. After a cutscene played, the horse was nowhere to be found.
On the bright side, you can sell the horses that you’ve stolen to a merchant in the Nomads Camp, which is further east of Troskowitz. The NPC is also in the same area where you can do the Combat Trainer I and II side quests.