I read that Sai Baba told someone to feed a black dog during Dev's Udyapan ceremony. Who was this person and what was the reason?

The provided source material from Chapter 40 does not contain any mention of Sai Baba instructing someone to feed a black dog. This appears to be based on a false premise. Instead, the chapter details an incident where Sai Baba promised to attend a devotee named Dev's Udyapan ceremony. Baba fulfilled this promise by appearing in the guise of a Sanyasi, along with two other companions. However, Dev was under a 'veil of Maya' and failed to recognize him, later writing to his friend Jog in disappointment. Baba then explained the situation to Jog, clarifying how he had kept his word, even if he was unrecognized by the host.