The research could also help with the training of ‘human remains detection canines’. ‘We know very little about what compounds or combinations of compounds are recognised by sniffer dogs,’ says Williams.
http://www.rsc.org/chemistryworld/2014/06/smell-death-cadaver-body-decay
From the same article.
' ‘Several groups are working on e-noses at the moment,’ Focant says, ‘but we are not sure if this technology will ever make sniffer dogs obsolete.’
Bar haemoglobin and certain other proteins present in transgenic pigs used to produce 'human' haemoglobin, there be differences in the amino acid sequences resulting from protein hydrolysis after death,as well as the residues from the decomposition of other organic compounds from a body.
Now I believe it has been established that blood samples that have been obtained were from human sources, so any reference to the pigs or 'fertilizer' is essentially a red herring, unless proven otherwise.