Why doesn't Odysseus greet Argos?

Odysseus does not greet Argos, his loyal dog, because he is overwhelmed by the sorrow of seeing his once-vibrant pet in such a decrepit state after years of neglect. Argos, abandoned and near death, symbolizes the passage of time and the loss of Odysseus’s former life. Instead of engaging, Odysseus chooses to silently mourn the loyalty and suffering of his dog, reflecting on the changes that have occurred during his long absence. His lack of greeting also highlights the emotional weight of his return to Ithaca and the stark contrast between past and present.