Affco spokesman Rowan Ogg said a "substantial number" of union members had moved to individual contracts since the lockouts began in February.
Affco chief executive Hamish Simson said the company had been targeted by the Council of Trade Unions and the meat workers' union because of dwindling union membership at Affco sites.
"The union has already stated the dispute is not about wages but about the authority the union has over the operations of the company and ability to influence or retain members."
Mr Simson said the company wanted a clear, modern, flexible collective agreement that was not subject to continued legal challenges. He urged the union to take "a modern approach".
Yesterday The Serious Fraud Office said it would not investigate Affco's allegations of irregularities in the union's accounts.
Affco claimed the union had not declared all the income gained from fees paid by its members but SFO chief executive Adam Feeley said investigators found no evidence of fraud.
- Additional reporting: APNZ