Absolute environmental disaster, they need to be spayed and neutered and occasionally culled by any competent local government.
You’ll also need to ban pet cats from walking outside without a leash. Our cats were neutered, didn’t stop them from killing any mice or birds they could get their paws on.
The reason they need to be spayed and neutered instead of outright killed is because culls don’t really work on animals that reproduce that quickly. Whenever a spot opens up for another cat to make its territory, it gets immediately claimed. There are a ton of research papers that show spaying and neutering is more effective at lowering stray populations, and that euthanization is more costly on top of being less effective.
I was talking about the cats that are kept as pets, not stray cats. I guess it varies from country to country, but most cats walking around outside in Norway are pets (~90%). Reducing the stray cat population to zero wouldn’t fix the issue of cats killing all the small wildlife unless pet cats are also kept inside.
I wasn’t saying anything against neutering cats.
