Neighbours cat breaking in and spraying

[Birch67]

Any advice on what to do? Our neighbours cat is breaking through our catflap (a microchip one) and spraying in our house. I've just replaced the catflap but it is still managing to break in!

The only option I can think of is to keep our cat locked in the kitchen at night so the other car can't get into the rest of our house. I'd prefer not to do this but can't think of anything else!

How is it breaking in?

Surely it's a defective cat flap if it doesn't work?

Are you sure it's not your cat spraying in fear?

To break in its banging the catflap multiple times. I'm sure it's not our cat spraying as she's been asleep on our bed when I've found her. The car flap definitely works but the neighbours cat is extremely determined!

Wow, what a thug! Our flap can be locked at night, might make it harder for the thug to break in and have a litter tray for your cat.

Stake out. Super soaker.
Job done.

A cheap motion activated ring camera and you can shout at the devious kitty to kindly stay out or fuck off.

Another option is to put a couple of strong sticky hooks on each side and drop a small bar or stick across so the cheeky skitter can’t get in.

I can lend you my Ddog? She's far from keen on cats! ( only cos she's scared of them....)