It should be more like -10.
They had a fully healthy offense for most of the game in week 2 while we were missing Taron Johnson, Bernard went down early in that game and we still destroyed them by 3 scores. In Miami. It easily could have been worse of the Bills wanted to score more points and didn't just try and run the clock out on the game.
Games in Buffalo have been a house of horrors for them for the most part.
If they keep the game within 2 TDs they will have done well. The average margin of victory for the Bills is 15 points over the last 13 games.