At first one should call to the local animal centre. Tell what kind of a dog is missing.  If they do not have your dog there, leave them your telephone number. Before you start searcing the dog, one has to leave to the place from where the dog left, the owners dirty jacket, blouse or somethig which smells to the owner.  If the dog has been missing MORE THAN AN half an hour, you should not call it by it’s name even if you see it. 
, do not use the dog’s name or shout "come here". You must talk peacfully instead.  It the dog likes to play with a toy which makes sound, you can make sounds with it or you can whistle.

Before you start searcing, leave a piece of the dog owner's dirty clothing and some food to the place from which he left.  Also water if it is a hot summer. Often  the dogs returns sooner or later to the place from which he left. In case it snows or rains you can place that dirty clothing or other cloth (used, because it smells of the owner) in a thin clean plastic bag. The dog can smell the owner through plastic.

If the dog is not found announce in newspapers and make A 4 announcements with the dogs picture in them.
You should return every day to the place where the dog disappeared
and take a metal grill with you and barbeque sausages, liver etc. If you hear that the dog has
left the area, leave food and anoucemts to the the new area, and grill there if you can.

When the dog is near enough you can grap it.  If you
call its name it will run away because its adrenalin is very high when
it has been on the run.
If the dog is near, do not look at it.
If you are in a safe place and are really familar with the dog, if you happend to see it, you can pretend that you hurt yourself, start to weep loudly, and fall to the ground, so that the dog gets worried, regonizes who 

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