Well, there is no roo around, so I guess the next step is isolation.
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More information on clutches for the uninformed...
http://en.wikipedia.org/wiki/Egg_incubation
http://www.stanford.edu/group/stanfordbirds/text/essays/Incubation_Time.html
http://www.newton.dep.anl.gov/natbltn/400-499/nb456.htm
Keep her isolated and just watch her, keep her food and water handy. If she worsens and still won't eat, hunkers over and looks miserable for more than 3 days, then I'd cull her. If she doesn't and seems to get better, just keep her isolated until the symptoms clear up.
My granny used to dose her birds with turpentine if they coughed or wheezed....no joke.And it worked!