White-tailed Deer Doe

I had a lovely encounter early this morning with a pretty doe. Isn’t she beautiful?  It was around 5:30 am and still a bit dark under the trees. We checked each other out for at least five minutes, me filming away and she nibbling on greens, before she somewhat nonchalantly headed into the woods. The deer appeared on the young side, with her knobby knees and keen curiosity. Please, any deer experts reading this post, do you think she is an adult deer or a teenager? How can you tell? Thank you!