"There's quite a few farmers around Cromwell and Bannockburn using drones in the day-to-day operations of their farm. It's just an extra tool".
Drones were particularly useful and cost-effective in mustering, Miss Heaney said.
"You can use them as an extra person and you don't have to pay them, but they don't take the place of dogs".
The more traditional style of competition would start from 8am tomorrow and continue on Saturday and consisted of the long head and the short head and yard competitions for heading dogs and the zigzag hunt and straight hunt for huntaways.
The trials, held on Sugar Loaf Hill on State Highway 6, typically attract 60 to 80 shepherds and more than 350 dogs each year and were known to attract the attention of passing tourists who would take in the action from the roadside, Heaney said.
The trials are the first in Otago each year, competitors and their dogs vying for a spot in the national competition.