If he chooses to have a cat flap knowing that other cats will get through it - op says he knows this happens and never had a problem with it prior to this - then yes it's common sense for him to think about this when protecting his bird. Is it not like leaving your full wallet in front of an open window then complaining when it gets stolen? Except in that case the robber would know they'd done wrong, a dumb animal does not. Take responsibility for your belongings, even if you think you shouldn't 'have' to. Or you can't really complain when things go wront.
People should be allowed have dog (or cat) flaps on their own property for their own animals without having to worry about other people's animals accessing it. Talk about a "blame the victim" mentality.
He knows they get in. He's done nothing to stop it. He hasn't contained the bird and now it's dead.
Except he did contain the bird. On his own private property inside his house.
And fwiw never in all my days have I met anyone with a catio or a fully chicken wired fence. It seems to be one of those things that exist only on MN. I do know people who choose to keep their cats in but I'd disagree that it gives them a full life. Maybe if they've never had full access to the outdoors but I personally find it very sad.
Oh, well I work with animals and know a few people with catios or cat-proof gardens. They're not hugely common over here yet, but they are becoming increasingly popular.
As is often the case on these threads, it's clearly entitled for cat owners to make the choice to let their cats out. But it's not entitled for other people to think all cats should spend their lives indoors for their convenience. Gotcha.
Nobody is saying cats should spend their lives indoors. They're saying that cats (like dogs and pretty much all other pets) should be contained on their owners' property, not allowed to free roam.