Historical clue formulations

• Farm call — 2014-08-16
• "Here, piggy piggy piggy!" — 2012-02-06
• "Here, piggies!" — 2011-07-27
• Cry on a hog farm — 2004-07-28
• Farm call — 2003-06-17
• Farm cry — 2002-06-20
• Cry before dinner? — 2000-03-17