Brady made some light throws and lobbed warm-up passes to wide receivers, according to the team's official website, but "clearly" favored the non-throwing shoulder and held it close to his body during his follow-throughs.
Brady's return to practice followed a Wednesday report from Comcast SportsNet New England that the quarterback underwent an X-ray to check for a separation to his left shoulder, but everything checked out OK.
Brady suffered a "typical ding" to his shoulder, a source told La Canfora, although it's not something the team really is concerned with at this time. Barring an unforeseen issue with the shoulder, both Brady and the team expect him to play against the Bills.
Brady has played through much more serious issues than this, and all of the testing was purely precautionary, sources told La Canfora. It also isn't uncommon for Brady to miss a Wednesday practice.
The Associated Press contributed to this report.