1, dogs are short of trace elements, and will have pica, olfactory disorder, and eating shit at first.

2, too hungry, when the dog is hungry and has no food source, he will eat his own excrement to fill his stomach.

3, psychological pressure, dogs are in a high-pressure environment for a long time, psychological pressure is high, there will be pica behavior, and they will eat their own Baba as a vent.

5, indigestion. If there are some undigested protein and other nutrients in feces, they will be eaten by dogs as food.

6. In order to destroy the evidence, many shovel officers will get angry when the dog poops anywhere in the house and punish the dog. In order to escape punishment, the dog deliberately ate poop to destroy the evidence.

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