The global event is running over four days (September 13-16) and is expected to draw in the region of 50,000 visitors.
Organised by the International Sheep Dog Society, the trials feature 240 competitors from over 30 countries.
Here’s a selection of photos from the Co Down location.
17. World Event
Brolly in use as the competition continues on day three of the event Photo: Jonathan Porter / Press Eye
18. World Event
Corinne Rella from Switzerland and her sheepdog 'Menna'. Photo: Jonathan Porter / Press Eye
19. World Event
A walk in the rain for sheepdogs and handler. Photo: Jonathan Porter / Press Eye
20. World Event
Enjoying day three of the international event at Gill Hall Estate, Dromore. Photo: Jonathan Porter / Press Eye
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