A dog might be man's best friend, but you can't ride one. Better to make friends with a horse!
The basic riding controls are the same as when you're on foot, Your horse can of course jump, slow to a walk, speed up to a canter or gallop which apart from speed affects the radius of turning and, naturally, drains the horse's stamina as well as your own. You can see your horse's stamina, only when mounted, as a green indicator just next to your health indicator.
If you try to push your horse when its stamina is too low, it will throw you. You'll also fall from the saddle if you're seriously wounded (hit by an arrow, for example), or you can be unhorsed by a halberd.
You can call your horse any time by whistling and mount it using But your whistle will also be heard by the people within earshot, which sometimes can be a disadvantage, while on the other hand it can also be a way of distracting attention...
Horses don't grow on trees though! It's a costly thing that you can only acquire by buying, stealing or getting as a gift or reward. You can compare you horses stats with those of other horses by holding Henry can only own one horse at a time: if you get a new one, the old horse's inventory will move automatically to the new one.
Once you get your first horse, you'll always have a mount.
Horses are your primary means of transportation in our sprawling world, but you can fight from horseback, as well. War horses can be used as living weapons with special moves and attacks (strafing, running backwards, several different kicks, etc.). Horses also serve as a secondary inventory for the player. We’ll have three types of horses in-game (courser, destrier, rouncey), and each offers different abilities, stats, skills, and perks. Your steed levels up on its own throughout the journey, and even comes with five slots for horse tack.