A federal grand jury investigation of Organic Pastures Dairy Co. has been delayed indefinitely.

Ken Gorman, a lawyer representing the dairy, said he was notified Wednesday that two employees who had been subpoenaed to appear before a grand jury today in Fresno do not need to do so.

Gorman said he has been in contact with Mark E. Cullers, an assistant U.S. attorney in Fresno, offering testimony from Mark McAfee, a principal in the Kerman dairy, which sells and champions raw milk, and e-mail exchanges with Food and Drug Administration officials on labeling issues from 2002 to 2004.

"[Cullers] said he is postponing the hearing to review additional documents from his investigators and our documents," Gorman said. "We appreciate the position he has taken on exchanging information."

Cullers did not return a call seeking comment.