‘Stay the course. Get ready for them to go for it. The Kansas City Chiefs are 14 of 17 on fourth down this season, which is the best eight-game start for any NFL team in the last 45 seasons. They’ve also gone for it on fourth down at the highest percentage of any team this season. The Bills’ defense, depleted as it is, has to be ready for the extra play. “Certainly, we’ve got a big one on our hands coming up here this week,” defensive coordinator Bobby Babich said Monday. “A team we’re familiar with, an opponent we’re familiar with.” The Bills’ defense needs to use that familiarity to their advantage and sniff out plays as quickly as they can.’