Of course cadaver dogs are trained with deceased animals. Mainly pigs. And almost certainly transported immediately after death. A bit like when a person dies and their next of kin is immediately asked about organ donating. There are probably programmes in place that farmers and vets etc can be part of in relation.- You would never advertise your dog as a specialist in that field without effective training been given. Also, in human beings, decomposition does begin instantaneously at death. The lips are blue in under 60 seconds. Lividity starts to take effect immediately when the blood stops circulating. Gravity instantly begins the process of drawing the blood to the lowest part of the body at ground point, this adds up to 'dead-weight'. I'm not sure what the correct term is, but it has to do with the breaking down of things internally results in gas being emitted. Sounds vile! And of course, the elements will increase or decrease the speed of he decomposition. A well trained dog could pick up on death even in the earliest stages. Of course, people, and certainly numbers of people, who spend time in and out of a 'death room will no doubt add to contamination of the area, which may confuse or hamper the dogs ability. Especially if the body was removed immediately X