The animals were spotted wandering along the A465 Heads of the Valleys road between Ebbw Vale and Abergavenny, forcing drivers to slow down as traffic began to build up. A farmer and his sheepdog saved traffic chaos when they rounded up loose flock - in the middle of normally-busy dual carriageway. Mobile phone footage captured the moment as the sheepdog calmly guided the flock alongside the road, keeping them under control. "Sheep loose on the main A465 being followed by a farmer and his dog." A farmer and his sheepdog saved traffic chaos when they rounded up loose flock - in the middle of normally-busy dual carriageway.