An advocacy group in Texas is singling out zoos under a newly enacted state law allowing complaints about unlawful gun restrictions to be forwarded to the state's attorney general for potential steep fines. Parents and children gathered last month to greet zoo visitors with warnings about the policy change, with some holding signs such as "Panthers not Pistols" and "Hey Gun Lobby, quit monkeying around!" Texas authorizes licensed gun owners to carry concealed weapons in public but the law exempts a variety of places — amusement parks, churches and schools, among them — and officials at the state's larger zoos cite some of those exemptions in arguing that firearms are not permitted. The St.