I'm happy to say that the chickens made it through their first night in the pen safe and sound. I went out around 3am to move them away from the side (they were sleeping right up against the netting), but luckily nothing had happened before then.

This morning I moved the pen (well, dragged..the wheels are definitely not working) to its new location, and they immediately started pecking for food. It was very rewarding to see :)