“…Errol Morris began this, his first non-fiction feature, in 1978 after reading a headline in the San Francisco Chronicle: "450 Dead Pets To Go To Napa." "Gates of Heaven" follows the stories behind two pet cemeteries -- one that fails (set up by innocent Floyd McClure at the intersection of two superhighways) and the Harbert family, who apply the latest marketing concepts to the pet cemetery profession.…”