You probably won't like my answer...How much smaller is she than the other leo and how large are both of them (weight if you know it). It is a common occurance for smaller leos to be intimidated by larger ones, and if the male happens to be sexually mature he could be pestering her an aweful lot and really stressing her out. You really should separate the two...besides the fact that you haven't quarantined. If you did separate them and she is alone now and still not eating, some of them take longer than others to get used to a new environment, as long as she's not losing weight (if she's alone) I wouldn't worry too much about it. Also make sure her temps are correct. Also...the female shouldn't be able to see the larger male when they are separated, as she could still be intimidated.
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Christina

Leopard Gecko Morph Descriptions
2.3 leos
-0.1 tangerine het rainwater albino w/jungle background (Blinkers)
-0.2 jungles (Vahz & Skissor)
-1.0 tremper albino (Spitfire)
-1.0 tangerine rainwater albino (Bronx)