Abandoned dog( calling for his owner who moved out)

A neighborhood dog that felt abandoned by its owner who moved out from there apartment. The dog was calling someone in the empty apartment.
https://www.youtube.com/watch?v=gM3eOFJaF8s
https://www.youtube.com/watch?v=1tBZxqND7tA
https://www.youtube.com/watch?v=XyHzw4vy0uo
Cause for the dog program. Thank you!