As always, this is a personal thing. Fawns will nurse until their Mother makes them stop, even long after it is necessary. Losing their spots comes with shedding their Summer coats, nothing more. Virtually all adult does in a healthy herd will have fawns this time of the year. I would bet that most people who don't "kill does with fawns" have actually killed does with fawns without even knowing it. Personally, I don't hesitate to take any doe i see if i have the proper tag. My belief is, if they were born too late to survive without their Mother by now, they are going to have a tough Winter either way. Just my $.02. Whack em' and stack em'