Meat workers are upping the ante as they challenge new employment laws.

The Meat Workers' Union is launching a campaign, in the wake of the government weakening workers' rights when it comes to collective bargaining.

Jobs that Count campaign manager, Darien Fenton, says the campaign will include a road show throughout the country and more talks with employers.

She says there's a few rogue companies who are undermining those doing good work in the industry.