I have two females that I am not sure how old they are but they are proven breeders. One I was told was an '05/'06 and she's the biggest of the bunch at about 2500g and the other I just recently got and have no idea how old she is. Her head is bigger than the other one, but she's thin compared to her. I really have no idea how old either of them are. The rest of mine are 2010/2011s, minus one who I believe is a 2009. So in short, none of mine are very old.