This led me to believe there were actual losses.
If it cannot get to the birds then perhaps animal control would have been a better option. Live trap it and take it to the pound if they wont come get it.
I am also on the live trap any that are indeed after your birds.
I do strongly recommend that your defences be beefed up.
In all my years (20+) of keeping chickens only once have I seen a cat actually even stalk my birds. He got trapped and a ride to the pound. His owners could either pay to...