The dogs gave no indication that they had found the scent they were looking for. Had they done so I'm sure the police would have reacted immediately.
Your opinion on the scent followed by the dogs is not substantiated by the details in the handler's report
**snip
After Rex was given the girl's clothing to sniff, he began to search on the ground floor of block 5 and when he passed the door of apartment 5 A (the place the girl had disappeared from) according to his handler, officer Fernandes, the dog altered its behaviour, sniffing with greater intensity than he had done before.
Apartment 5J of the same block was also checked as the dog had been more agitated than before as if there were a very strong strange odour there.
It was stated that this apartment had been unoccupied for some time.
Afterwards, the same kind of search was carried out using the dog Zarus which in general terms showed the same behaviour in the same places as Rex had done.
It was only when all the searches of the apartments in blocks 4 and 5 were complete, that the behaviour described above was registered.
It is certain that this kind of work does not correspond to the area that these dogs were trained in, but given that these types of dogs manage to discriminate a specific odour from others, although it could be a remote possibility that they related the odour of the missing girl with a possible location where she could have been.
http://www.mccannpjfiles.co.uk/PJ/GNR_SNIFFER.htmAll the apartments were searched by the dogs and when they arrived at apartment 5 J they began to sniff with intensity at the entrance door. During this behaviour it was noted by the PJ officers that there must be some unusual odour, but which with all certainty did not have anything to do with the odour being searched for, but there must have been something strange inside.
After entering the apartment, it was observed that the dour came from close to the fridge, which was open and contained some rotting meat and vegetables.
During the searches carried out in the apartments no sign of the girl was found by the dogs.
http://www.mccannpjfiles.co.uk/PJ/GNR_SNIFFER.htmThe dogs showed an interest outside the door of 5J on the 7th May with both dogs independently reacting outside 5A and nowhere else, apart from perhaps a tray.
No search of 5J took place until the 10th of May when entry was made seven days after Madeleine's disappearance, with a visual search ~ no forensic examination ~ determining there was no trace of Madeleine there.
The evidence provided by the dogs' interest was ignored and the area indicated by them ignored also. What other potential evidence was discarded in like manner?