My sister works at the National Zoo here in Washington, DC. It's located right next to Rock Creek Park, which runs from suburban MD into DC. I see deer there every time i drive Rock Creek Parkway at night, including a fair number of bucks. She said that last week she saw a fawn bed downabout ten feet outside her office window in some branches that had been cut for grounds maintenance. A little while later, the mother came by, and the doe started to nurse. So, yes, some fawns still nurse. I think others are right, though, they're probably not dependent on it at this phase, unless they were dropped REALLY late!