I don't know, I didn't think my male was old enough but I have caught him trying for a month or so. I am trying to show some more pics but for some reason I can't get the pics right. How do I make the pic size smaller to post them .
Leslie, the best way to tell their age is by their teeth. It will not give you a 100% sure age, but a somewhat age. You have to look at their teeth and count how many "big girl" teeth they have. I will look for a link to show you what I mean, but I am sure someone here will be able to beat me to it.
As a butt picture, I have to see their BUTT, tail up. We really have to see their "CHA CHA, as some one said. (Their Vulva).