Interesting question.... Like you I rarely will shoot a young one in the fall bow season, usually unless it is a really late fawn they can make it on their own, the reason I don't shoot them is not enough meat on em! In the later seasons I am more willing to shoot one, right now its blackpowder here in NJ. I have killed three deer this year, 2 big does, and one buck, so even though I wouldn't mind shooting a young deer, I am holding out for a nice buck.... at least I was on Saturday night.... we will see what happens, but like I said if I need the meat and am not seeing bigger deer I will shoot one. Doe fawns are sometimes bred during the fall, and even then they often only have one fawn, where a big doe is almost always bred and normally has 2 fawns, so in a low deer density area shooting the younger doe makes more sense. We don't have that problem here, so I usually opt for the bigger deer.