Here it is there are markings from y horse, so edit it a bit to make your own markings. I realize most people downloading this will not want to edit the markings on it but PLEASE do. It's a small thing to ask.
The markings are fro a canine model.
Hair can be easily added just Google pictures of horses copy the mane and viola! you can paste it on and create your own design. Long mane, short mane, curly/wavy mane etc.
THIS IS WHAT IT LOOKS LIKE ON A FINISHED HORSE.