I just took some real pigeon eggs, and blew them out. So if I ever need to put some fake eggs under a hen, I'll just use those.
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If all else fails, that is still an option. But of course with fake eggs, you can reuse them and not take away from breakfast 
Other than pigeon supply places, I'm not sure. I put standard sized eggs under mine. That's why I have so many big sex-link looking things running aroundThey pay no attention to the size difference.![]()
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