When it is cadaverine, I am imagining that is the horrible nasty fluid that the body produces when it is decaying?
Cadaver scent is what Eddie is supposed to alert to, which would not be very strong as Madeleine if she had died in 5a was not left for long, in my opinion not long enough for cadaver scent. I also find it very difficult to imagine that the scent would be there three months later.
In the Sam Parker case Eddie alerted in the garage 6 months after Theresa Parker went missing and was proved correct 3.5 years later when her body was found in 2010.
Kate Prout was reported missing on the 4th November 2007.
Eddie alerted on the 19th December 2007.
That's a total of 46 days later.
Eddie was proven correct on 25th November 2011, when Kate Prout's remains were formerly identified.
The investigation team has taken 1,338 statements and collected 1,027 exhibits. Having reviewed all of the documents, 7,154 actions were raised and 560 lines of enquiry identified, and over thirty international request to countries across the world asking for work to be undertaken on behalf of the Met.
Officers have investigated more than 60 persons of interest. A total of 650 sex offenders have also been considered as well as reports of 8,685 potential sightings of Madeleine around the world.
The Grange team received on average two hundred emails a week, and following the media appeal in October 2013 across three countries, received over 7,000 responses.
http://news.met.police.uk/news/update-on-the-investigation-into-the-disappearance-of-madeleine-mccann-1354598,685 potential sightings of Madeleine and nada!