Bradshaw was injured in the Sept. 22 game at San Francisco. He has seen medical specialists in Arizona and Los Angeles to get extra opinions on his neck.
"Ahmad has obviously seen several specialists, collected a lot of information," Colts coach Chuck Pagano said Friday. "He's going to take the next couple of weeks to kind of sit back and decide where he's going to go with this thing. I don't know ultimately where that is. But in the end, it'll be up to Ahmad and the doctors to come to a final decision on what's going to transpire there. He'll be out at least a couple more weeks."
Bradshaw also suffered a neck injury while with the New York Giants last season.
"Again, I think it's a matter of calming things down, taking some time to just figure out where we're at with this thing," Pagano said. "Consult with trainers, doctors and just make the right decision. Ultimately it's what's best for Ahmad."
Bradshaw, who signed a one-year contract with the Colts during the offseason, leads the team in rushing with 186 yards on 41 carries.