first factor

The dog lack calcium substance and phosphorus, the dog that the lack of this substance usually him will eat own feces

second factor

The dog trah Retriever like Golden Retriever, Labrador Retriever, the Coat Retriever Flat , had hobby to bring something at his mouth.
solution: asked him playing as throwing the ball, or giving him the toy like the Newspaper that was rolled or the stick for him playing

Third factor

There was of the bacteria in the digestion of the dog so as the dog could not digest his food well.
solution: gave him yoghurt (acid milk) that contained the bacteria “good� to oppose the bacteria “bad� available in his digestion.

fourth factor

His food (dogfood) did not right so as to be not digested well.
The waste that went out was still having the aroma that was the same as his food.
solution: change dogfood with the other make.