Jeremy Shockey has “an issue” with the Giants, and it seems to be getting worse. The angry tight end took his feud with the team to a new level this week, when he apparently had a heated exchange with Giants GM Jerry Reese during the team’s three-day minicamp. A team source confirmed there was an argument between the two, although when it occurred isn’t exactly clear. Shockey has been present for the entire mandatory three-day minicamp