Cordy Glenn and Kyle Williams both were absent from practice to start the week, with head coach Doug Marrone telling reporters later in the afternoon that both players were under the weather. It's not uncommon for players under the weather to miss practices early in the week, so there's no reason to panic about their availability on Sunday just yet.
Sammy Watkins, meanwhile, did practice despite a hip injury, but was among several players limited. (The rest of that list: Robert Woods, Chris Hogan, Marcell Dareus, Bacarri Rambo, and Dan Carpenter.) The Bills will likely continue to limit Watkins, and whoever else they need to, for the remainder of the week to ensure that all five are available to play in Denver.
Meanwhile, in news that does not affect the Broncos game (but might just be meaningful when the Bills take on Oakland in two weeks), running back C.J. Spiller returned to the practice field on Wednesday, a bit over six weeks after having surgery to repair a broken collarbone. The Bills now have a three-week period in which to add him to the active roster, and he can play as soon as Week 16. That's a situation to monitor moving forward.