You can avoid the feral cat problem by buying a flap that only open for your cat. It feel the chip. Probably has to buy onlineHaven't seen one of these in the Paphos area, but tbh cat flaps in Cyprus could be problematical I think.
We had one for our cat when we were in Britain and it was very useful, but he was confined to 2 rooms. We don't have one here so
a) wildlife he may catch and bring in alive won't have the run of an open plan house
b) feral cats won't be able to squat in our house. Our cat is fairly sociable.
The downside is we have to let him out in the early hours most nights