I have a male and female RT and this morning when I went to feed them and found two eggs! (She originally had three but one of them crushed it...) How do I know if it's fertile? I placed them in their own soil in a plastic container in an open shoe box with a small dish of water next to their heat lamp... I really can't afford to buy an incubator so what is the chances the eggs will actually be fertile... I've had them for 3-4 years and she shows the "pregnant" signs every summer, so I NEVER thought she'd actually lay any! Please help, thanks!