My first setup started as a simple pen with no top and graduated to a birdcage with the PVC frame. It was built on a budget over a couple of months. I'm upcycling what I had. I think the stock panels are a great idea and surely are much stronger than the PVC. Only predator I worry about is a 40lb chow/golden retriever mix that doesn't seem too interested in chicken on the hoof. She likes hers fried