I have been in the photo editing (graphic/web design) industry for over 6 years now. I do photo editing all day for some large corporations on some pretty boring pictures lol.
So I would like to offer my service to you for free. Wether its a horse, a dog or a person, as long as you have rights to the image let me know what you want done. I fix things such as color, new backgrounds, "clone over" repairing an image. Maybe there's a fence in front of your horse and you want it out of the picture, I can do that. If you want something extra like, a desktop background, wings, words, etc......Just ask, I can most likely do whatever you ask. Just understand I do not own a magic wand and at times I have a long work day/night. The bigger image the better!!!
Here are just a few examples, I'm sorry I can't remember all the names, my memory has always been bad. Please if this is your horse let me know.
Cloud's Mystique - I believe the tail was bagged in the original or you wanted it thicker.
Can't remember sorry!!!
I removed a horse from this image and re-colored to black and made the "feathers" white again
Slight color repair, could have fixed further with a better quality image.
Just a few, the rest are on an external HD I don't have with me right now.