Typically when the egg is formed, the shell is the last to be added. In the few egg bound birds I've seen, the egg is visible at the vent, there's a large bulge there and the bird is very lethargic, fluffed and hunched over. The last bird I worked with was a Western Screech owl that had an egg that was quite large. She had a terrible time passing it. Between heat, oxygen, lubricating the cloaca and a small dose of Oxytocin she finally got it out. But even then we thought she wasn't going to make it. I'm happy to say she was released after a week.
If you think your bird is egg bound, it would be best to let a vet take a look.
Thank you for responding so quickly, no my bird is full of energy & singing her heart out at the cage door right now so I doubt if she's egg bound. Still I will keep a eye on her for any changes. So far its just the paper fascination.
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