The source mentions Sai giving instructions to a devotee. Who was told to feed a black dog and for what reason?

The provided texts do not mention Sai Baba instructing anyone to feed a black dog. Instead, the narrative in Chapter 40 describes an incident where a devotee named Dev invited Baba to an Udyapan ceremony. Baba promised to attend, and He did so in the guise of a Sanyasi accompanied by two other people. Dev, however, failed to recognize Him and later wrote a letter feeling deceived. As recounted in Chapter 40, Baba explained to another devotee, Jog, that He had indeed kept His word and attended the meal, but Dev's delusion prevented him from realizing the truth.