Collins (hip) was a limited participant during Wednesday's practice.
Collins was able to play a majority of the Patriots' defensive snaps during Sunday's win over the Steelers, and he should be able to see that same level of activity in Week 8 versus the Bills given he avoids any setbacks throughout the week.
Mitchell (hamstring) was listed as limited at Wednesday's practice.
Mitchell, who was on the field for 31 out of the Patriots' 57 snaps on offense in this past Sunday's win over the Steelers, should be fine for this weekend's game against the Bills, but as long as Chris Hogan and Julian Edelman both remain healthy, the rookie's target volume will be sporadic.
Bennett (ankle) was listed as limited at Wednesday's practice.
Bennett was on the field for 30 of the Patriots' 57 snaps on offense in this past Sunday's win over the Steelers, and with no reported setbacks, there's nothing to suggest that his availability for this weekend's game against the Bills is in danger. Supporting that notion is that the team rosters just two tight ends (Bennett and Rob Gronkowski) after trading AJ Derby to the Broncos on Tuesday.
Lewis (knee/PUP list) did not practice Wednesday, CSN New England reports.
Lewis -- who tore his left ACL last November and is bouncing back from an additional procedure on his knee in August -- is still expected to join his teammates at practice this week, and once that occurs, the Patriots will have a three-week window in which to activate the running back. With New England on bye in Week 9, we'd be surprised if we saw Lewis in game before then, especially with James White handling the team's pass-catching back duties capably.