The 29-year-old failed to train on Wednesday and will need to successfully complete a final session to take his place alongside Jonathan Brown for the Lions.
Bradshaw strained a stomach muscle in last week's loss to Hawthorn in Launceston but managed to complete the match.
"He did it and he played on, so we expect him to be okay, but that was the reason that he didn't train on Wednesday," Lions coach Leigh Matthews said on Friday.
Losing Bradshaw would be a massive blow for the ninth-placed Lions, who Matthews admitted had "no margin for error" after losing five of their past six matches.
"Against the Kangaroos (in round 18) we had 12 guys who had shots at goal but we openly had three goal kickers," Matthews said.
"So that was purely an accuracy issue.
"Those small medium forwards, (when) you get two or three shots at goal it makes an enormous difference if you kick three or none out of your three shots.
"Purely the conversion accuracy is holding us back in terms of those small medium forwards."
The Bulldogs, assured of their finals berth, will be looking to regain their consistency after losing to the Kangaroos last start.
Coach Rodney Eade said his troops were genuinely excited about the trip north to face the Lions.
"We've won there the last three times. The players seemed to like playing at the Gabba," Eade said.
"Every time we've trained there the night before the game they've had a real spring in their step.
"I don't know whether it's the warm weather but the players seemed to respond well to playing in Brisbane.
"I don't think it's so much the opponents I think it may be the venue."
Matthews doesn't dispute the Dogs' record in Brisbane, but played a familiar straight bat when told of Eade's comments.
"We can't deny facts," he said.
"But it's all about tomorrow night and how we play and how they play."
Certainly one Bulldog familiar with the Gabba is Jason Akermanis, who has promised a big performance after being criticised for his effort against the Kangaroos.
Matthews is under no illusions the former Lion will be primed for a big game.
Asked whether Akermanis would like nothing more than to knock his old club out of finals contention, Matthews replied with a smile, "I'm sure."
