Good on 'em
The way Australian cattle farmers treat livestock is pretty despicable. Animals are moved on journeys that often exceed 1000km or more in crowded cattle trucks to a coastal port. They are then exported by ship to places such as Indonesia and the Middle East where they have their throats slashed while still alive by the usual Halal brutality
If the farmers had any concern for animal welfare (and breeding cattle for killing excludes them from that category) they would at least have local abattoirs and not subject the animals to weeks of poor travelling conditions before an unpleasant death. It's barbaric.
They may whine about privacy invasion by drone but I've never yet heard a farmer complain about Australia's proposed data retention and monitoring.