A bird that is egg bound will be reluctant to move. She will often hunch over and waddle like a penguin. Her abdomen will feel hard, and if you gently insert a finger into the cloaca, you might feel the stuck egg. You might also notice loose watery droppings and a lack of appetite.
To treat, give her some warm water baths. 90-95 degrees works. While doing this, gently massage the abdomen. Give calcium and vitamins, as this will help her lay the egg.