I'm not understanding your question. These scent detection dogs have amazing abilities to alert to a very small sized material. Molecular sized materiel.
A HRD dog should only alert to the scent of human remains. They shouldn't alert to animal remains. If a HRD dog does alert to animal remains it's not doing it's job correctly. Think about it. What good would a HRD dog be if it alerted to every dead animal scent it came across?
It would be useless. EXACTLY AMEN to that Ranch
When Grimes went to the FBI, there was a case in 2007 of a cop with a missing wife in the states. The cop was arrested for her murder but no body found but witnesses said he was constantly arguing with his wife etc.
Other HRD dogs were bought in and indicated death cadavar...but without a body there was nothing else they could do.
Grimes did a test with Eddie, they put cadavar scent on a pair of trousers and hid them etc, and the dog found them and indicated so the FBI asked him to attend the crime scene.
The dog indicated more or less same place as the other one, the car and boat, and one other place he wasnt happy about. Again no body was found.
This guy was found guilty of killing his wife.
Several years later they found her body about 13 miles away from her home.
Did he kill her who knows he says he didnt. BUT two dogs indicated death and both near to a vehicle which could have clearly carried her away.
ALL THESE dogs are tested and tested and if they fail they are never used again.
My friend has been training dogs since the seventies and she explained to me how hard it is to do this. One fail they are out.
They would never use anything other then human cadavar scent to train them.
That would be like asking a drug dog to be trained sniffing paracetamol rather then cocaine....
or a bomb dog sniffing plastic without the explosive .......
The dogs dont LIE. They just find what they are trained for and move on. They can never say who the body belongs to, only that sometime there was one.