FIRST, congrats to her on the deer.
SECOND, I agree with the others, just a youngbuck from the looks of it. Very proportional to a yearling.
THIRD, this is one of the problems with harvesting does, little bucks get killed in the process also. My father-in-law killed 2 button bucks last year shooting them as does. I can't stand shooting anything without a antler on their head, because everyone makes this mistake once in a while.