The Hall-of-Fame-bound quarterback practiced Thursday while many other veteran teammates were no-shows.
"It's always good to have No. 4 here," said new Packers head coach Mike McCarthy. Favre worked out in the weight room Wednesday with strength and conditioning coach Rock Gullickson, the team's packersNews.com Web site said.
Favre is looking to bounce back from his worst season (4-12) as a pro in 2005 when he threw 20 touchdowns and 29 interceptions and had a career-low 70.9 passer rating.
"Being 4-12 was obviously new to me," he told the Milwaukee Journal Sentinel at a news conference last month. "As the season progressed, we were playing from behind, and it was different."