The 2019 Cobber Working Dog Challenge started on Monday and will continue for the next three weeks.
Working dogs across the country have been rigged with GPS trackers to see who clicks up the most kilometres during the contest.
It's the fourth time the national competition has been on.
There are two competitors from NSW, a kelpie named Turbo, owned by Daniel Pumpa and who works Merinos on "Roseville Park" at Wambangalang, and Mick, a Collie-Kelpie-Coolie cross owned by Emma Lawrence at Wallabadah, who works cattle.
Last year's winner was Boof, owned by Henry Lawrence and Mr Lawrence says he's got a soft spot for Turbo, "because he's had a broken back and showed a strong drive to come back".
But Mr Lawrence said South Australian entry Jed, a Border Collie owned by Peta Bauer, has to be a front runner simply because of the sheer numbers of stock he's working with.