Trade unionists said today that they may boycott a top supermarket for putting 350 jobs at one of its suppliers at risk.
Vion Food Group said it may have to close Anglesey's Welsh Country Foods because Asda has switched to another supplier for its lamb.
Unite, which represents the Welsh operation's workers, says members should now consider whether they should shop at Asda.
Unite Wales secretary Andy Richards said: "As the Asda hierarchy dithers on a decision, 350 workers and their families on Anglesey are being forced to face the fear of ongoing uncertainty about their future employment.
"I would urge the Asda management to quickly wake up to the reality of their earlier decision and do to the right thing and overturn it with immediate effect. Until they do our members and their families will be seriously considering their custom at Asda."
Local protests are already being planned at Asda stores on Anglesey and in Bangor.