In my opinion it is an awesome thing to determine as sceptics do that the indications made by one animal at a supposed scene of crime set the marker as far as evidence is concerned.
Alfie found Zampo who prolifically assisted police in confirming many of Thomas Quirk's fantasy murders where it seems there was a suspension of disbelief in all concerned if the following quote is anything to go by ...
Snip: A breakthrough seemed to come when a bone splinter was found by a ‘cadaver dog’ called Zampo at one of Quick’s murder sites. Two scientific experts who looked at it were quite sure it came from a girl of about the right age; subjected to molecular analysis, however, it was found to be a piece of fibreboard. (In the meantime it was taken as the clinching piece of evidence in one of the cases.)
https://www.lrb.co.uk/blog/2013/12/02/bernard-porter/the-thomas-quick-affair/Of recent cases in Britain it is evident that more than one dog is used when searching for human remains; we've watched them being taken to possible scenes of crime in news reports and we know that more than one dog was used in the search for Susanne Pilley, Shannon Mathews and in the latter searches when cadaver dogs were deployed in the village of Luz by Operation Grange.
In cases where Eddie was deployed in Britain for example the search for Attracta Harron ... more than one dog was deployed.
In my opinion it would appear that it is standard procedure to have alerts confirmed by more than one search and recovery animal.
Just as it is in America where Martin Grime has been used as an expert witness in court cases ... but never with reliance on one animal ... there is
always the back up of at least one other team consisting of dog and handler.
I think the unreliability of using one dog and one handler is something which escapes the understanding of sceptics despite the fact that despite not possessing cadaver dogs per se it was a factor well understood by the GNR handlers who employed it in Luz ... and in at least one instance the officer worked 'blind' preferring not to know the location of the McCann apartment so he did not (clever Hans) his dog.