And Horse Hit Full: Petra Biehle

I need to verify dates, names, correct spelling, and any subsequent changes in policies. Also, ensure there are no inaccuracies in the account of the incident. Sources like the USEF website, news articles from 2011, and any tributes she received. I should also check if "Hit" was correctly the name of the horse or if there's a mix-up. Some sources might refer to the horse as "Hid," so need to clarify. Additionally, confirming the exact cause of death and the medical response time.