Meatworkers are continuing to picket the CMP Rangitikei lamb processing plant at Marton while the union waits to hear whether the company will agree to attend a mediation hearing.
Negotiations for a new collective employment agreement broke down two weeks ago and the company served a lockout notice on meatworkers who refused to sign individual contracts.
The new contracts included a pay cut.
The company says most of the workforce has signed the contracts and are processing stock but about 100 union members have been picketing the plant.
The union challenged the validity of the original lockout notice in the Employment Court but failed to get an injunction blocking it.
The company has since issued two further lockout notices.