Perception seems to be that the Lions are a live 'dog because they finally got rid of Matt Patricia and will play harder under interim coach Darrell Bevell. That remains to be seen. I never thought much of Bevell's play-calling when he was an offensive coordinator. 
The Bears are home, have owned the Lions and have a far superior defense. The Lions' plight is going to continue to be rough if Kenny Golladay and D'Andre Swift both remain out. I don't expect either of them to play. They are Matthew Stafford's best wide receiver and running back. 
Chicago has defeated Detroit five straight times, including 27-23 on the road in Week 1. Mitchell Trubisky plays great against just one opponent - this one. Trubisky has completed 67.5 percent of his throws against the Lions for 1,601 yards and 14 TD passes in six games. The Lions' defense isn't good to begin with and now they'll be minus veteran cornerback Desmond Trufant and run-stuffing nose tackle Danny Shelton. 
The Bears are more likely to be fired-up than the Lions. Chicago has lost five in a row, including getting buried in embarrassing fashion against the Packers in their last game. Matt Nagy ripped his team after that loss. Because their next three games are against the Texans, Vikings and Jaguars, the Bears still could get into the playoffs. So a hard effort should be forthcoming.
Detroit has failed to cover 11 of the past 15 times as an underdog.