If Madeleine is still alive, which I believe from a multitude of pointers (Circumstantial evidence) … then there will be an abundance of DNA from Madeleines hair and body fluids. These could have been obtained from a living Madeleine in 2017, or before, when it looked like OP Grange were closing in
As Misty has pointed out, the ears never change .. so they are more important than the DNA IMO.
As I pointed out before any cadaver dogs will only identify a cadaver, not if it is Madeleine or Inge or someone else.
It is the EARS that matter if identifying a cadaver thought provisionally to be Madeleine.
Some time back I studied Madeleine's ears and it wasn't that easy.
1. Most photos were showing front-on facial features, and no ears.
2. Her long hair generally covered the ears.
3. Would both ears be mirror images?
So to be able to identify Madeleine from her ears you would need to have seen and defined the shape of her ears to begin with.
Do you know if that has ever been done?
For the ears to be still present on a cadaver it has to have been a relatively recent death. If she was killed and left on the surface of the ground maggots would destroy the body within weeks and parts that might survive the maggots would soon be scattered by wild animals and birds looking for things to eat.