Union bosses are warning it'll cause disruptions to supermarkets.
Government vets who carry out checks on animals and food at Northern Ireland's ports are beginning a 5 day walkout.
Union bosses are warning it'll cause disruption, but supermarkets are playing down the risk of product shortages.
Carmel Gates from union NIPSA says the action is being taken because of a wider row over pay:

Taxi Driver Protest Suspended Pending Outcome Of Talks
BREAKING: Green Light For €1.3bn Drainage Scheme Serving Kildare After Court Agreement
Irish Troops Come Under "Small-Arms Fire" In Lebanon
€17,000 Paid Out For Pothole Damage In Kildare - But Some Claims Now Deemed ‘Act Of God’
€2.2bn Children’s Hospital Misses Yet Another Deadline As Kill-Based BAM Brings In International Experts
Maynooth Study: Poor Insulation And Draughty Homes Leaving Families Sick In Some Ageing Council Estates
Nikita Hand Welcomes Supreme Court Decision Against McGregor Appeal In Civil Rape Trial
Council’s Strict One-Off Rural Housing Rules Leave Naas Farmer With No Way To Rebuild Home On Her Own Land