When there was no girl's hockey team, Shelby Herrington was allowed to play on the boys' team at her high school. Herrington, a junior at Bishop Brady High School in Concord, is now fighting a decision by the New Hampshire Interscholastic Athletic Association that says she must join a new girls' team formed by her school and Trinity High of Manchester. The association's lawyer, Michael Callahan, said allowing girls to play for the boys' teams would weaken the girls' program. Herrington's parents filed a lawsuit in Merrimack County Superior Court petitioning a judge to let their daughter keep playing on the boys' team.