That Doe is definetly older and wiser too...probably put out many Fawns over the years too!
I'm guessing at least 4-5 years or older....they make great Teachers for the younger Doe's,as long as she doesn't give away your locations where You hunt I would let her walk...some older Doe's will pick You off and blow a warning to all the other Deer,we had a few like that and ended up shooting them becasue they would blow our cover and smelled us then ran off warning all the other Deer!