Put a $5 bounty on them. See UTE’s with cats loaded in the back going to cash in. Then quick freeze them and sell the meat.
I remember New Zealand had the same problem back in the 80’s because NZ had no predators to keep the population down.
The government had a rabbit hunt with a bounty paid on each rabbit killed.
PETA went absolutely bonkers!
I remember Rush making fun of PETA by playing the theme from the Born Free movie with gunfire sprinkled through it.
It was pretty funny.
It seems like Australians caused this problem and road blocked the means to deal with it.
If you are going to put a bounty on a critter then you also have to let people own firearms. Going after critters with rocks just won’t work.
Some people like to eat pu .... uh ... "kitty".