The assertion that Atlanta Falcons quarterback Michael Vick gambled on dogfighting appears to be a more serious threat to his professional football career and freedom than the federal felony charges that he helped organize and run a dogfighting ring. Federal prosecutors are preparing a new set of indictments in the case against Vick. The charges are believed to include counts stemming from gambling that he is suspected of having financed. That is one reason Vick?s lawyers are considering a guilty plea that would avoid a new indictment. Whether or not Vick pleads guilty, his suspected connection to gambling could jeopardize his football career. The N.F.L. prohibits any association with gamblers or with gambling activities. Such involvement may result in severe penalties, including ?a suspension from the N.F.L. for life,? the league?s gambling policy states.