I did pop her, but im not sure if im doing it right, because i just got a normal MALE today, and it is forsure a male, but when i popped him nothing "pops" out!!! So i think i am doing it wrong!!! I noticed thought that the forsure male, has a longer tail ( from the vent to the tip of the tail) than my "female"!!! So does tail length tell me anything?!?! Is there any other ways of sexing???