That is misleading, once blood leaves the body of a living person it dies. They
will hit on blood once the cells die/rot and start to release cadaverine. In fact the body fluids of living people can also contain cadaverine, urine, semen, sometimes saliva etc...
During the Madeleine McCann investigation cadaver dogs hit on a wall of the hotel room. The scent turned out to be blood that had splashed onto a wall and had been washed with detergent, after testing they determined it came from a white male and it was several years old.
http://amaralfiction.blogspot.com/2011/01/cadaver-scent-proof-of-death-or-walking.html
http://textusa.blogspot.com/2015/05/cadaverine.html
try to keep it to a minimum.
Cadaverine is a compound formed during the breakdown in the human dead body of lysine, an amino acid. The technical terminology is that cadaverine is the decarboxylation product of that amino acid, lysine.
It is naturally produced in the decomposition of animal tissue.
It has an extremely pungent odour, strong and distinct. It is the major contributor to the smell of rotting meat.
To say ERVD dogs can mistake cadaverine for blood is wrong. Cadaverine is cadaverine and will only be cadaverine. An ERVD dog does not mark blood. When an ERVD dog marks a location it means that cadaverine is present there.
That doesn't rule out the possibility of blood also being present. If a blood dog marks also that location it means that both substances are present.
ERVD marked the cadaverine, the blood dog the blood. No confusion or mixing up of smells.
These dogs are specifically trained and work like radios where the dial is fixed so that it can tune only one station. There may be hundreds or even thousands of radio-frequencies flying about in the air but that particular radio will only capture and play that particular frequency no other.
The chemical formula for cadaverine is: C5H14N2
When one joins (in chemistry and biochemistry “joining” has a very specific structural meaning) carbon (C), hydrogen (H) and nitrogen (N) atoms in the right number and sequence, then one gets a cadaverine molecule.
The only ones that make the nerve endings of the trained dog's noses tingle to this stimulus and this stimulus only - the ERVD dogs
There is no such thing as artificial cadaverine. There is artificially produced cadaverine and naturally produced cadaverine.