Really good video and I like some of the questions you raised about the different horse breeds. I hope there will be a couple of them at least. There should be real difference between the village/woods workhorses, riding cavalry horses and maybe ponies. I hope they will also add jackasses with their stubborn nature - after all, a medieval village without jackasses is a farce.
The thing that you raised and that deserves answering is the amount of attention the horse and dog will need, i.e. watering, feeding, sleeping, considering that these stats will be important for the main char. Would you care to share some light on that, @TobiTobsen, @Hellboy?
Also, if the game will have realistic hunting, and cooking, will we be able to make horse sausages (or actually decide to kill the horse/dog in order to preserve the hungry main char)?