The Bears top the NFC North division, having won all three of their games so far this season.
The running back told the team's official website: "It doesn't look like they changed up anything, and I think it's because the players have been there and have grown in that system, and that makes it easy for them.
"They play a lot of zone, but they blitz, too. Their main thing is getting turnovers, that is where they thrive. Getting turnovers and scoring off those turnovers. They keep everything in front of them and then try to make you make the mistakes with fumbles and interceptions.
"Holding onto the football has definitely been a point of interest this week. We know that if we don't turn the ball over we have a really good chance of winning this game."
Bush missed last week's game against the Washington Redskins with a knee injury.