The source text mentions someone being told to feed a black dog. Who was it and why?

The provided source material from Chapter 41 does not contain any information about Sai Baba instructing anyone to feed a black dog. Instead, these passages detail the story of a devotee named Balasaheb Deo and his specific spiritual struggle. He deeply desired to read the Dnyaneshwari daily but was continually met with obstacles that prevented him from doing so, even though he could read other books without issue. This led him to make a vow to only read the Dnyaneshwari when Sai Baba himself gave him a direct order, a story which highlights Sai's loving guidance for his devotees as described in Chapter 41.