Coach Pat Shurmur had hoped Hillis would be able test his hamstring with some light running, but a team spokesman said Hillis did not do any such conditioning.
Shurmur said it was too early to say if Hillis will play this Sunday against Seattle.
Also Wednesday, linebacker Scott Fujita was sent home earlier in the day with symptoms from his concussion. Fujita, who was injured in the fourth quarter Sunday, was at the Browns' training facility, but the team's medical staff sent the 10-year veteran home to rest.
During the early stages of Wednesday's practice open to the media, rookie nickel back Buster Skrine left the field escorted by a trainer and did not return.
Haden, the Browns' top defensive back, injured his knee on Oct. 2 while making a tackle against Tennessee and missed last week's game at Oakland. He said Wednesday that his knee is progressing from daily treatments and hopes to be ready Sunday.
"It's better," Haden said. "Last week I couldn't do any running. I wasn't ready for it. But now I'm jogging on it and just doing a whole lot of treatment -- eight hours just trying to get it right."
Copyright 2011 by The Associated Press