Free range kitties have substantially reduced the incidence of Giant Canada Geese in this area and now our sidewalks are no longer green and slimey.
The funny thing is my wife saw the same cat when she was walking the dog and it wasn't a neighbor's cat, it was skinny and needed food. So now she feels guilty. If I find that cat it will be like the roach motel, they check in but never leave unless we find an adoptive family.
I seriously don't believe cats kill 5 million birds a year. Think of it as improving the breed by culling the week.