A weekly look at what the Green Bay Packers must fix:

It's not just that the Packers allowed the Chicago Bears to rush for 235 yards on Sunday at Soldier Field, but it's how it happened.

Nearly two-thirds of that came before the Packers even laid a hand on anyone. The Bears gained 147 of those yards before contact, according to ESPN Stats & Information.

A review of the film showed gaping holes for Matt Forte and Ka'Deem Carey. But perhaps the most egregious of all the run defense breakdowns came on a play by quarterback Jay Cutler. On fourth-and-1 in the first quarter, he fumbled the snap. He then picked it up off the turf and ran right through the middle of the Packers' defense for 15 yards.

It's no wonder the Packers found themselves ranked dead last in the NFL in rushing defense.

And the Minnesota Vikings must be salivating at the thought of running against the Packers on Thursday night at Lambeau Field. Only the Vikings ran for more yards on the ground in Week 4 than the Bears did. They put up 241 in a victory over the Atlanta Falcons on Sunday.

Defensive coordinator Dom Capers played rookie Mike Pennel for 22 snaps on Sunday. It was the first playing time for the undrafted rookie. Considering he's their biggest defensive lineman, perhaps more snaps are in order to try to clog up the middle.