Keep it in or put a fucking bell on it's collar.
I've just seen a neighbours new cat leap from the ground and grab a goldfinch from one of my feeders. Yesterday I found 2 piles of feathers and the day before a dead sparrow on my doorstep. In 4 years of feeding I've never had a cat problem untill this new one arrived.
I'm going to have to stop feeding them, I feel like I'm luring them to their deaths. Sad as it sounds I'm gutted, feeding the birds is something I get immense pleasure from.
I'm really quite pissed off