RE: I just couldn't do it.....
imo you did the right thing, i go for solatary does or does with yearlings, a doe with fawns will be easy to tell by the size, her fawns should be much smaller. a single deer by itself is usally the toughest to judge, the does will be running the young ones off soon, because she'll be ready to breed again. i know this probably dosent answer your question but i say you made the best choice, your first one will come soon though......
best of luck the rest of the season