Hahahaa yay thank you guys!! I have suspected that Zippy was a gal since she turned a year old but thought I would wait until she was a bit bigger to confirm it with the 'Tortoise Gods' ) I think that Turbo is a boy as his tail is longer and he has a bigger spike on the end, though his tummy is still flat as he is wee. We will see if I am right in a couple of months.