Females produce infertile eggs if they haven't been mated before or still have viable sperm. Far as I know, it doesn't matter if they are cooled or not. If the dragon decides to lay eggs she will, fertile or otherwise.

Three dragons in a 75 gal tank does sound crowded though, which may be why they never produced eggs before. Some animals won't reproduce if in condition they don't consider ideal.

My female burmated two winters now, but hasn't produced infertile eggs at all. Nor does she show any desire to have a mate. I think its more if they can smell a male, or see one, then they will want to mate...I don't own a male bearded dragon, so she doesn't feel the urge.
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PHLdyPayne

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• Egg laying - joshmo4evr, Thu Apr 2 13:23:46 2009
• RE: Egg laying - faygo19, Thu Apr 2 13:54:46 2009
• RE: Egg laying - BDlvr, Thu Apr 2 16:17:25 2009
• RE: Egg laying - joshmo4evr, Thu Apr 2 21:44:21 2009
• RE: Egg laying - PHLdyPayne, Thu Apr 2 23:24:53 2009
• RE: Egg laying - BDlvr, Fri Apr 3 09:31:19 2009
• RE: Egg laying - ryan_m, Fri Apr 3 17:03:04 2009
• RE: Egg laying - BDlvr, Fri Apr 3 18:26:24 2009
• RE: Egg laying - ryan_m, Fri Apr 3 19:24:37 2009