in my area it is relatively easy to tell a BB from an Adult Doe, and experience has taught me this over the years.
It's kinda easy
in my area, too. It's not come to me shooting one I didn't intend to. Like I said....I've shot one (piebald). I didn't determine OR care about his sex, when I put a bead on him. It was a deer I intended to take, regardless.
It's only taken me a short time to learn to look first and shoot, second. 101 stuff.