No dog alerts were valid because too many of them were demonstrably unreliable.
Why could Eddie "find" a scent on cuddle-cat when it was hidden in a cupboard he could find no trace of all the time he could see it, sniff it and pick it up?
Why could Eddie find no trace of a scent on clothing in the villa, yet "find" scent on the same clothing after it was transported to the gym?
We know what scent he found in the Renault Scenic and it wasn't incriminating (Gerry's blood).
Why were the inspections of all other villas whistle-stop, yet long-drawn-out and protracted in apartment 5a
....
And so on.
What does the "and so on" refer to?
Those questions you ask, are, well, just questions by a layperson, instead of proving the alerts were "demonstrably unreliable". Only Mr Grime knows for sure. Well, at least 100 times better than you I would imagine. Then again you would probably disagree seeing as you and others have accussed him of being a liar, cheat and a fraud.
PS It has been explained before. The "whstle stop" tours were just that "because" there was no interest shown by the cadaver dog. But in any case, you would expect a handler to concentrate on the last place a missing person was. That was just IMO