Agricultural experts say the recent indictment of former executives at a Maine biological laboratory for allegedly mislabeling and smuggling poultry viruses into the United States highlights illegal practices that could have caused disaster for the poultry industry. And the practices may be more widespread than anyone knows because they are not easily uncovered by authorities. "I would speculate that there is more of this going on than we know about," said Dr. Don Hoenig, Maine's state veterinarian. Three former executives from Maine Biological Laboratories in Winslow face federal charges, including conspiracy and mail fraud, for allegedly smuggling the virus that...