The first dogs to arrive were local patrol dogs. They sniffed the blanket and set the route. The S & R dogs from Lisbon sniffed the bath towel at 11pm on 4th and then followed the same route. They repeated the same route some days later. The lower pic shows the route they all took.

Thank you Gunit.
Foto 4 shows exactly where I believe the pick up car would have been parked. Right adjacent to the gate from the garden which served the flats and balconies for watching 5A .
Anyone watching people checking Madaeleine would exit via that garden gate to a car exactly there.
However it is my belief that the tracker dogs unwittingly were tracking the scent of the abductor/s en route to 5A rather than Madeleines scent.
The blanket would have his scent on it and a nervous person would have a powerful smell about him/her.
Madeleine was being caried on a gusty night and her feet did not touch the ground. I believe that most of her scent was not transfered to the route
... and the tracker dogs were actually following the scent of the lifter from the car park around the building to Madeleines room rathe4r than the reverse
I believe that the scent stopped on that car park, because that is where the abductor/lifter startted his walk to 5A (Madeleines room)
Thank you Gunit, once again you have helped me.
This strengthens my idea that a watcher was viewing everything from the balcony opposite, cos the getaway car, it seems WAS parked right by the back gate to the balcony
Hidden in Plain Sight.