Wayne Pacelle, president and CEO of the Humane Society of the United States, left, speaks at a press conferece after Philadelphia Eagles quarterback Michael Vick, right, spoke to students at Wilbur Cross High School in New Haven, Conn., Tuesday, Nov. 23, 2010. Vick urged high school students in Connecticut to show kindness toward animals, adding to the string of appearances he's made since returning from a dogfighting conviction to become one of the NFL's most exciting players. (AP Photo/Bob Child)
Philadelphia Eagles wide receiver DeSean Jackson (10) is tackled by Dallas Cowboys cornerback Alan Ball (20) and Terence Newman (41) after catching a 60-yard pass in the first half of the Eagles' 30-27 win on Sunday in Arlington, Texas. (Associated Press)
FILE - This Oct. 17, 2010, file photo shows Atlanta Falcons corner back Dunta Robinson, right, and Philadelphia Eagles wide receiver DeSean Jackson, left, helped after a hit during the first half of an NFL football game, in Philadelphia. The NFL's brain, neck and spine committee meets Wednesday, Dec. 8, 2010, to talk about possible changes to helmets and other equipment. (AP Photo/Mel Evans, File)
Philadelphia Eagles' Brent Celek (87) is brought down after a catch by Houston Texans' Brian Cushing (56) as Bernard Pollard (31) closes in during the first half of an NFL football game Thursday, Dec. 2, 2010, in Philadelphia. (AP Photo/Michael Perez)
Philadelphia Eagles quarterback Michael Vick, left, scrambles past Houston Texans' Antonio Smith in the first half of an NFL football game Thursday, Dec. 2, 2010, in Philadelphia. (AP Photo/Michael Perez)
FILE - In this Nov. 28, 2010 file photo, Chicago Bears linebacker Brian Urlacher (54) reacts to a play with teammate Lance Briggs (55) during an NFL football game against the Philadelphia Eagles in Chicago. Between the wrist injury last year and the neck and back problems before that, there were all sorts of questions about Urlacher. Teammates, however, insist they had no doubts. Now, Urlacher is up to his old Pro Bowl tricks again for the Bears. (AP Photo/Nam Y. Huh, File)
Chicago Bears fan Erik Grogan holds a sign about Bears linebacker Brian Urlacher, before an NFL football game between the Bears and the Philadelphia Eagles in Chicago, Sunday, Nov. 28, 2010. (AP Photo/Nam Y. Huh)
Philadelphia Eagles wide receiver Jason Avant kneels next to his teammate cornerback Ellis Hobbs as he is looked at after an injury during the second half of an NFL football game against the New York Giants in Philadelphia, Sunday, Nov. 21, 2010. (AP Photo/Miles Kennedy)
Philadelphia Eagles quarterback Michael Vick speaks to students at Wilbur Cross High School in New Haven, Conn., Tuesday, Nov. 23, 2010. Vick urged high school students in Connecticut to show kindness toward animals, adding to the string of appearances he's made since returning from a dogfighting conviction to become one of the NFL's most exciting players. (AP Photo/Bob Child)
