The 2nd way this picture could be called a mis-nomer is the fact I used the word 'roam'. When I hear this word I think of animals running mightily on endless plains, kicking up the dust in the air, while some cinematic soundtrack plays in the background. These horses tend to just stumble about in no hurry, eating constantly, while wondering why you are stalking them with a tripod and taking pictures.
This is not an HDR picture but is taken from a single image. I used Topaz Adjust to add a bit more colour and 'arty it up' a bit. I then used layer masking to mask in the horse's fur texture from the original RAW file.