Cat owners in Western Australia have just two weeks to sterilise, microchip and register their animals before new feline control laws come into effect on November 1.
The requirements apply to all domestic cats aged six months and over.
Anyone not complying can be fined as much as $5000, while cats impounded for "offending behaviour" could be destroyed after seven days if their owners cannot be identified.
Cats must be registered with local governments, with certificates proving the animal has been sterilised and microchipped.
The standard registration fees range from $20 for one year to $100 for a cat's lifetime. Pensioners get a 50 per cent discount.
A registration tag must be on the cat's collar when it is in public.
In the City of Perth, registration applications are already being accepted, but some other councils aren't as well organised and don't provide forms on their websites.
That means owners need to contact their council in person.
When the Cat Act passed in the state parliament in late 2011, then-local government minister John Castrilli gave examples of offending moggy behaviour as threatening wildlife or being a nuisance by damaging property.
He said rangers would "use their discretion" in instances where, for instance, a neighbour has complained because a cat has used their garden as a latrine.
While 93 per cent of cat owners did the right thing, he said, local governments needed power to deal with irresponsible owners such as cat hoarders and with wild cats.
Cat Haven general manager Roz Robinson said she hoped the laws would lead to a reduction in unwanted kittens and cats being brought to the shelter.
"Every year we see a huge number of unwanted kittens being surrendered to us," she said.
The Cat Haven received more than 8000 unwanted or lost cats last year, with about 3000 being destroyed and only 116 reclaimed by owners.The Shenton Park facility offers a subsidised sterilisation and microchipping program to help pensioners and low-income earners.