We've had to put up with a neighbours (3 houses away) killer cat for the past couple of years, constantly stalking and climbing the oak tree in our garden. They sold up and moved in January and within a few weeks the Robins, Blackbirds, Dunnocks etc came back, nervously. We've been cat free for months until I noticed a new one a couple of weeks ago. The small birds have again disappeared from the feeders. Blue Tit's are still active in the box and I'm now on sentry watch.
Domestic cats are bastards. I really do hate the furry fuchers. It should be an offence to allow them free roam.