ive seen many times that the doe gets shot and later in the season the fawns will get shot in that same area, i did it once shot the doe with bow then had two different kids shoot a fawn each out of the same stand later in rifle. they were full of food and seemed to be doing fine. As far as winter id say they would have been fine, predators, who knows even with the mother they are at risk, im from maine and we have plenty of both they normally come through it Id shoot her