If it looks cute then it is a young deer.
Think about puppies and dogs. The puppy will have a short fat and full face where as a dog will have a longer full featured face. Same with deer. Young does will have short fat faces that look cute. Does will have long noses and huge ears and be far more muscular than young does.
Keep in mind that does are just like bucks in terms of body structure as the age. They too get sway backs and pot bellies.
Old does... notice the very long noses and large ears.
Young does (maybe a button also)... notice the short, cute faces and small ears.
