GH1,
Go to the feed store and buy a bottle of "cut & heal" it's a liquid and smells like turpentine. It's promotes healing and actually will draw the shin together if the area is not to big. Apply 2-4 times a day to the shinned area.
In another life we hunted hogs with dogs and when they got cut up thats what we used. Worked on my horses in new mexico as well.
Regards.