The Twin Spires at Churchill Downs. Getty Images Every Kentucky Derby is ripe for chaos, but this year’s Run for the Roses has all the right ingredients to produce a shock winner . Unlike last year, when bettors targeted Journalism, Sovereignty (the eventual winner) and Sandman out of a relatively weak field of contenders, this year’s crop of horses is incredibly difficult to separate. Renegade, who drew the dreaded No. 1 post position, is the chalk, but he was already considered a lukewarm favorite before he was slotted into the inside rail. The last horse to win from the No. 1 gate was Ferdinand in 1986. And beyond Renegade, it seems like bettors are having a really tough time establishing who the horses to beat are in this field. No. 6 Commandment and No. 18 Further Ado were tagged as co-second favorites on the morning line at 6-1, but it looks like they both could drift as bettors pile money onto No. 8 So Happy and No. 9 The Puma. Other trendy horses that could pop up Saturday include No.…