Can you describe the incident where Sai helps a devotee by telling them to feed a black dog? I believe it involved Balasaheb Deo.

Based on the provided source material from Chapter 41, there is no incident described where Sai helps a devotee by instructing them to feed a black dog. The story involving Balasaheb Deo centers on a different kind of divine intervention. Deo was deeply troubled because, for a long time, he could not successfully read the Dnyaneshwari daily, even failing to read five verses consistently. As Chapter 41 recounts, he made a personal vow to only read the text again when Sai Baba Himself gave him the direct order and the "love" to do so, demonstrating his complete surrender to his Guru's will.