Why did Sai Baba tell Dev to specifically feed a black dog, and how does this relate to the Udyapan ceremony he was conducting?

The source text from Chapter 40 makes no mention of Sai Baba instructing Dev to feed a black dog. The story centers on Dev's Udyapan ceremony and his invitation to Baba. Baba promised to come, and He appeared disguised as a Sanyasi with two other men. They were served a meal, but Dev did not recognize Baba. In a letter to Jog, Dev expressed his disappointment. As detailed in Chapter 40, Baba later revealed the truth, saying "You did not recognize Me! Why then did you call Me?" The entire episode highlights the theme of recognizing the divine in unexpected forms, not a directive about feeding an animal.