The little black chicken has laid an egg - ending my speculation about it's gender. I was keeping them locked in the cage all the time but finally gave in to their pitiful calls. I'm going to leave them out while I'm on the block - not even lock them in at night since it was the early morning calls for release which were driving me crazy. It's a risk but hopefully I can rescue them when the dogs come back, or the goanna/hawk/fox/cat. They will still be locked up over the weekend when I'm at Cathy's.