Yup. They’ll eat anything. We spent 2-3 hours cleaning the mess up on our side and in our woods. Then the neighbors mowed and shot a bunch of it back in again. My birds like to wander onto their side because they keep their grass short and they can get at worms easier. Along the way they try to pick up any plastic or cardboard debris they can get. I think only one of them got a plastic piece and only saw a few manage to eat the cardboard. I’ve done my best to keep them on our side since then. Their yard is still a sty and that’s been since Memorial Day. They just keep mowing the shit over and over. Drives me insane. It’s time for a fence.