Viking quarterback Brett Favre is considered day-to-day after suffering a concussion Monday night in Minnesota's loss to the Chicago Bears.  Favre continues to take concussion tests to try and get cleared to return to the practice field.  Rookie Joe Webb is getting the first team snaps in practice.  Running back Adrian Peterson missed practice Wednesday because of a thigh injury.  Interim head coach Leslie Frazier plans to give Peterson a chance to practice today.  Toby Gerhart would start in Peterson's place if Adrian cannot play.  Minnesota plays at Philadelphia Sunday night at 7:20, pregame on WJON at 6:00.