A total of 120 sheep have been stolen from a farm at Cockburnspath.
The incident took place sometime between 9am on Friday and 8am on Saturday at a field beside Kinegar Quarry.
In total, 40 ewes and 80 lambs were taken.
The animals were all Suffolk/Charlois cross breeds and anyone who can assist police trace those responsible for their theft is asked to come forward immediately.
Those with information can contact Police Scotland on 101 or alternatively, the charity Crimestoppers on 0800 555 111.