IMO these dogs did find Madeleine's freshest scent.
I think their route should had been investigated more precisely.. ie. with a fine comb search at the time.
And if they indeed did find her scent the second question is what does this mean?
I find it interesting that both dogs followed a trail to apartment 5j and am puzzled as to why the fridge had been left open allowing the food inside to rot.
>>>Clip<<< At about 23.00 accompanied by a PJ inspector, the searches were begun. 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.
On 10th May at about 20.10, upon the request of the PJ, searches were carried out in all of the apartments belonging to blocks 4 and 5 of the OC, two tracker dogs and two search and rescue dogs being used for this operation, adopting the same methods as those used on 7th May, just that this time the apartments were all open and searched one by one, being accompanied by a representative from the resort, who had the keys to all the apartments (apart from those not under her administration) and also with the objective of helping with the searches. The collaboration of all the guests occupying the apartments at that time was requested for this purpose and those apartments that were found to be empty were opened by the administrator.
All 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.
http://www.mccannpjfiles.co.uk/PJ/GNR_SNIFFER.htm#p13p3517