Bryant is still dealing with the thigh contusion that he suffered during the first quarter of the season opener. He missed Dallas' Week 2 win and only practiced once before playing in Monday night's victory over the Washington Redskins, when he caught four passes for 63 yards. He was limited during Wednesday's light practice.
"When you stress it like you do during the course of a ballgame, sometimes it doesn't bounce back as quickly as you want to," coach Jason Garrett said. "He just has to continue to work his way through it. We're hopeful by the end of the week he can practice a little bit more and be ready to play in the ballgame. We'll take that one day to day."
No. 1 receiver Miles Austin is expected to miss his second consecutive game with a strained hamstring, making Bryant even more important to a Cowboys offense that failed to score a touchdown Monday night.
Quarterback Tony Romo (fractured rib) participated in practice Thursday, but said afterward that he'd likely need another pain-killing injection before Sunday's game against the Lions. Romo had two injections vs. the Redskins.
"It's a fracture," Romo said. "It is what it is. It either feels better or it doesn't. It's nothing really much more."
Fullback Tony Fiammetta (hamstring) didn't practice. Garrett said he hopes Fiammetta will be available Sunday.
Cornerback Orlando Scandrick (high ankle sprain) and kickoff specialist David Buehler (groin) hope to be ready to return after the Cowboys' bye next week. Defensive end Jason Hatcher (calf) could also be ready to play the New England Patriots in Week 6.
Tim MacMahon covers the Cowboys for ESPNDallas.com.