Smith (knee) didn't practice Thursday, John Glennon of BroadwaySportsMedia.com reports.
The tight end wasn't listed on Wednesday's injury report, so his Thursday addition is notable. What Smith is able to do at practice Friday should clarify if he's in any danger of missing Sunday night's game against the Packers. If he is limited or out for the contest, added targets would be available for Anthony Firkser and Geoff Swaim, along with MyCole Pruitt to a lesser degree.