Was traveling last week and a BO hen went broody. Wife gathered eggs and put 12 under her Monday nite. That day by chance the hen had switched nests she was on. I got home Tuesday afternoon. When I went out to check her she had moved back to the orginal nest, leaving the eggs untended. My question, are the eggs still viable after her setting on them overnight, and possibly part of the day and then getting cold for a few hours? or do I need to start over with new eggs? I moved them back under her, in the "preferred" nest and she is still under them.