We hardly find traces of information about their presence. One didn't take notice of the dogs, because their presence was taken for granted.

People who think they need high-pressure methods or tools—pinch collars or electric appliances—to train a dog have no clue how to train a dog well. Training, both as a hobby and as a profession, should be pleasant for the dog and the handler. It should be a successful learning process that yields progress for both parties. If training becomes a torment for the handler or the dog, then both parties are on the wrong track.

If you train your explosive dog using a half-ounce target scent, it will miss one pound of the same material because the scent pictures of a half ounce and a pound are different. For humans the scent is the same -a bit stronger or weaker- but for the dog it is the difference between making a detection and not. You need to plan for this and reinforce using targets of different sizes and weights.

A Doberman Pinscher can sometimes spontaneously run riot, often even leaving the field entirely. After a short time, he will come back with an amazed look in his eyes and happily jump on his desperately calling handler.

He learns a bit more slowly than a shepherd dog, but what he learns he knows forever. The Rottweiler is a very fine character dog, but not everybody is suitable for this type of dog.