My mother sent me an emailed link - thought I'd share. I didn't see this already as a thread, but if I missed it in my search, feel free to delete.
Prince Harry rides his way into middle of polo controversy | The Upshot Yahoo! News - Yahoo! News
More info, and photos. Some may find the pics a bit graphic, so fair warning.
Prince Harry faces animal cruelty claim over polo pony's stab wound from his spur | Mail Online