Just following normal forum practice.
I notice you cherry picked the bit of my post you wished to respond to and ignored the first part.
I rather imagine that Dr Anna William's sentence you quote may have referred more to the appropriate use of dogs in the field rather than the gas chromatography machine she used in her research ... and not as implied that the dogs were 'better'.
It could be argued if one was so inclined, that one is an unquantifiable variable and the other the opposite ... but it is more interesting perhaps to note the ignored scientific findings reflecting much of the discussion which has taken place on the McCann boards over the years.
Quite obviously in working dog circles much of what is now the subject of scientific study and proof was already known to those in law enforcement and dog handlers.
Hence the absolute necessity for corroboration of any dog alerts.
That is the part of the equation absolutely misunderstood by Mr Amaral; he assumed that the indicator of the dog alert equated with authentication and gave the proof to enable him to slap arguido status on the Drs McCann.
We know a lot better now than most in 2007 could (not forgetting Martin Grime's caveat in his statements) due to the studies which have taken place in the intervening period ~ that he was entirely wrong without forensic corroboration.
Dr Williams also mentioned the odour of faeces ~ fishy pong ~ paint thinner and nail varnish remover. We have had the endless bad jokes and smileys about sea bass and dirty nappies ... new ones will perhaps require to be manufactured to support her findings about holidaymakers displaying naked toes in flip flops using nail varnish remover and whether or not the apartment required redecoration (paint thinner) after the assault it had recieved with dragons blood sufficient to interfere with forensics.
Not forgetting that as well as pig based fertiliser ... there is now the added component of someone walking across freshly mown grass with which to contend ... the difficulty being that
all are backed with scientific papers and documented proof.