Jared Allen won’t call Sunday’s game a “must” win, but says “it’s one we’ve got to have”

The Vikings have slid from 4-1 to 5-4.  In their final game before the bye week, they host the Lions, a 2011 playoff team that has climbed out of an early-season hole to get to .500. Minnesota defensive end Jared Allen knows that his team can’t afford a loss that would drop them to .500.…