Why is it called dog excrement luck, not cow excrement chicken excrement X excrement?

Bad luck is ironic that you are lucky, or it can be said that bad luck is good luck.

Lucky means that good things happen for no reason, just like stepping on shit. This kind of thing rarely happens and there is no reason. It happened by accident, and it was not a good thing, so someone found money or something, which shows that he is a lucky dog.

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Because dogs always shit in the street, the chances of stepping on them are high, so if they step on them too much, people will joke that you are so lucky.

Cow dung and sheep dung mainly appear in rural areas and are rare crop fertilizers for farmers' uncles, so farmers' uncles will never waste them. You might step on something smaller. o