The word "poor dog" usually has two meanings. One is a literal meaning used to describe dogs who are economically poor or have poor living conditions. This may refer to stray dogs or dogs that are not well cared for.

Another meaning is that "poor dog" is used as a metaphor for a person, implying that the person is economically poor or in a difficult situation. Difficult financial situation. This usage usually carries a certain derogatory and disrespectful connotation and is not widely recognized by people.

Whether it is used to describe dogs or people, it is inappropriate to use words like "poor dog" because it may be discriminatory or insulting. We should respect the dignity of every person and animal and avoid using such words to describe other people or animals.