The 2019 Cobber Challenge starts today, with 11 dogs from across Australia competing to win the title of Australia's hardest working dog.
This morning, they're setting out wearing GPS collars as part of the fourth annual event.
Tonight, when the 11 dogs from across the nation come in after a day's work in the paddock or in the yards, the data will show just what they've been up to.
This national competition sees the dogs' movements tracked every day for three weeks.
Their speed, distance and duration results are uploaded online each evening.
Points are earned based on daily activity until Sunday, September 1 to determine the winner of the coveted Cobber Challenge trophy.
"We're looking forward to seeing the results begin to roll in this evening, as our 11 competitors come in from a day of hard work," Ridley group marketing manager Ian Moore said.
"Each dog-owner team has different work planned for the first day of the competition, it's all dependent on the season and what jobs need to be done on the farm."
Today, Jack Febey and his Kelpie Monty from Tasmania will be working with both cattle and sheep, shifting them around and keeping everything in order.
"Monty can go all day, he's got the right attitude and just never stops," Mr Febey said.
Emma Lawrence and her Collie/Kelpie/Koolie-cross Mick from Queensland will be mustering cattle, weighing calves and sorting and drafting cows.
"There's always something to do, but Mick seems to have endless energy," Ms Lawrence said.
"He's super quick but will last all day, I think being raised on our hilly farm has given him incredible stamina."
Meanwhile, Jim Harradine and his dog Bridie from Western Australia, will be starting to push the sheep up to the crutching trail.
"I'm always surprised by how far Bridie can go," Mr Harradine said.
"We've done a couple of test runs with the collars, with good weather we'll get some good runs in and she'll clock up some decent distances."
Henry Lawrence, the owner of last year's winner Boof, is tipping Peta Bauer's Border Collie Jed, from South Australia, to possibly win.
"Jed's got a good chance because of the sheer number of stock he's working with," he said.
"But I've also got a soft spot for Turbo, the Kelpie from NSW, because he's had a broken back and showed a strong drive to come back, and Boof's like that too with the injuries he's had."