make it so u can live up horses they would get experience to level them up depending on the time you wil lride them
these levels give you skillpoint to invest on your horse for example how much speed your horse will have how much hp they will have how much stamina they will have and hp/stamina regeneration
this will make every horse an indevideul ofc their still would be horse like the spirites horse and warhorse regular horse hardy horse and so on but they skillpoints will be an extra bonus on that