Well as all said its up to the hunter. But after all I've read and talking to several biologist killing deer from all age classes is a good idea. I wouldn't shoot only my biggest does now. Especially your mature does, they are the ones that live on your property and are at home. Those yearlings will eventually disperse. Currently on a piece of property I hunt with my 6 yr ole here I have 3 does all with fawns still and I wouldn't kill any of them till later in the season. However when I do decide to shoot one it will be one of the two that only had a single fawn because the one with twins is older and healthier. She probably will continue to drop 2. Just my 2 cents.