Not blood, but he may well have been in contact with dead pigs. The point I have been trying to make is that the ambiguity of Eddie's alerts, because of his training, opens up the possibility of something other than human cadaver scent in that apartment & on the clothes. Had FBI dogs been used, the results may have been somewhat different.
Excellent post, Misty.
Once trained ... they cannot be untrained.
If they are trained on pig they will react to pig ... whether or not training on human remains is introduced at a later stage.
For example, Keela was trained exclusively using human blood and we are told reacted to nothing else.
Some American dogs, are trained exclusively on products from human remains and are therefore conditioned to react to nothing else. Making your point valid regarding FBI VRDs trained exclusively on human remains.
Interestingly, Martin Grime is on record that his dogs did not react to pseudo scents.
VRDs are capable of being fooled by methane which is a product of human decomposition ... in a property occupied by at least four other families then closed prior to inspection by the VRD ... Eddie could have been excited inside by the same odour he encountered in the pathway outside 5a ... no-one will ever know.
