I personally have passed many doe with fawns. With that said, I may be changing my ways. I just read an article in Bowhunting that said that the fawns are more likely to stay in the birthplace range if they are orphaned. Therefore, if one of the fawns is a big buck (eventually) it will have a better chance of staying close by if mom isn't around. There was more good info on shooting doe also. Good article.