ANCHORAGE, Alaska (KTUU) – The Iditarod Trail Committee announced Friday it has yet to determine the cause of death for three dogs who died during the 52nd Iditarod in March. According to the report, gross necropsies – defined as a post-mortem examination on an animal – were performed immediately following the passing of Bog, a two-year old male, George, a four-year old male and Henry, a three-year old male.