Nos. 85-7078, 85-7167 and 85-7170. Argued and Submitted January 6, 1986. Decided December 30, 1986. William C. Bottger, Jr., Latham Watkins, Thomas W. Shreve, Los Angeles, Cal., for Kellogg. Jeffrey L. Cutler, Davis, Frommer Jesinger, Los Angeles, Cal., for Local 250. Jerrold Wohlegemuth, Sandra S. Elligers, Atty., N.L.R.B., Washington, D.C., for N.L.R.B. Petition for Review and Cross-Application for Enforcement of an Order of the National Labor Relations Board. Before WALLACE and SCHROEDER, Circuit