Meatworkers Union members at AFFCO's eight North Island plants are asking why some are locked out and others not.
A 24 hour strike is being held in support of about 760 others locked out by the company on Wednesday after a breakdown in negotiations over a collective contract.
Eight AFFCO plants were picketed on Friday morning.
In the picket line at Horotiu in Waikato when the strike began at 5am, were four members of one family: two of whom had been locked out and another two were on strike.
One said he believes his family had been targeted.
AFFCO says it is still operating with non-unionised employees and it locked out some people and not others to send a serious message to the Meatworkers Union.
The company says the number on strike is closer to 500 than the union estimate of 1700.