I agree with what was said but someone also told me that even a buck fawn will have a change during the rut, and will have a fuzzy back of the neck. I have never read anything on this but it seems to be true. I am on the skinning shed commitee and I check the weight, the hoofs, take the jaw bone out and on does if milk is present. I also for my own behalf look at the buck fawns, hopfully not too many, and check their neck and it does seem to be diferent from the smaller does. I for one use the bigger deer are usually not a buck fawn but if they are close and I can look I look for the neck.