Three cheers for responsible pet ownership. There’ll be no native bird, mammal or reptile deaths while this Swedish owner/companion is in charge.
20 – 120 million native animals are killed by domestic/wild cats in Australia per day. (A gander at some photos of mammals whose numbers are plummeting because of cats will be enough to ensure you never let Fluffy outside unchaperoned again, Australians.) Even in Sweden, where native animals have had hundreds of years longer to adapt to the domestic cat, these predators are a problem.
The standard justification of “I feed my cat so much, s/he won’t hunt” holds no weight. Research (above and here) shows that cats are programmed killers and will hunt even if fed sufficiently at home.
So grab the kitty collar and join the growing number of people who choose pets AND native wildlife.