A drought there means the desperate marsupials are edging closer to people's houses to look for water.
The problem is worst near Canberra, where tired and thirsty roos have killed at least one small dog.
But animal rights groups have tried to stop a cull ordered by the government last month, saying kangaroos only attack if people get in their way.
"Just because there are a lot of them around here doesn't mean we should not be looking after them," said animal rights protestor Simone Gray.
But kangaroo victims don't agree.
Kangaroos turn mean
One woman in Canberra reported being cornered by kangaroo and says she was scratched and bruised after it took a swipe at her.
Kangaroos can weigh up to 80 kilograms and grow as tall an average man.
Experts say they rarely attack humans, but the fact they are starving could be encouraging them to show a mean streak.
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