(AP) — Jay Cutler can sense a different vibe, a calm in the huddle as the Chicago Bears enter their second season under coach Marc Trestman. The Bears host the Buffalo Bills in what they hope is the start of a run to the playoffs after missing out for the sixth time in seven years last season at 8-8. There are some concerns after the defense and special teams struggled in the preseason, but now is when it all starts to count. The Bears tried to address that in the offseason, bringing in defensive end Jared Allen as part of a major overhaul. Cutler's ability to stay healthy remains an issue, considering he hasn't played a full 16 games since 2009. Offensive coordinator Aaron Kromer mentions the consistency in Cutler's technique, his footwork and precision with his throws. S Chris Conte was medically cleared and went through a full practice Thursday after suffering a concussion in the third preseason game against Seattle. Conte also missed the start of training camp and first two preseason games while recovering from shoulder surgery.