About 25 warehouse staff and drivers at DBC Foodservices in Dundonald, Ayrshire, have struck over an increase in working hours.
The action started on Thursday of last week and runs until Monday of this week.
Staff in the GMB union voted overwhelmingly for action after being told their hours would be increased from 37.5 to 45 hours a week with no additional pay.
Powerful protests keep up the pressure
Bosses are obsessed with making cuts
Another year of inaction from our rulers