Good news... Perry was a participant in today's practice that did not actually exist:

GREEN BAY, Wis. -- It was an only an estimation because the Green Bay Packers don't actually practice on Fridays anymore, but for the first time since outside linebacker Nick Perry injured his shoulder Nov. 16, he was listed as a participant in practice.
http://espn.go.com/blog/green-bay-pa...houlder-injury