In good habitat a doe fawn can reach 70lbs in her first year. This actually has been shown to equate to doe fawns coming into estrous that first year - further increasing deer densities (in areas with good habitat, enough food per deer!).
often you’ll see, what looks like blood in snow. That can be a young fawn in estrous or a doe coming around again due to breeding not taking first go.
Hope it helps!!