Affco, the company at the centre of a long-running employment dispute, is disappointed Labour leader David Shearer visited workers on the picket line but didn't visit management.
Mr Shearer joined about 40 locked-out Affco workers on the Horotiu freezing works picket line yesterday.
Union workers faced their 77th day locked out or on strike in a dispute with Affco owner Talleys about their collective agreement.
The Meat Workers Union is in talks over a third offer on the table, which workers say is no better than the previous two.
Affco's director of operations at Horotiu, Rowan Ogg, said he was disappointed Mr Shearer had taken the time to visit the picket line but did not talk to management.