Dev felt deceived by Baba. Was this because he failed a test involving feeding a black dog as instructed by Sai?

The provided passages from Chapter 40 do not mention any test involving feeding a black dog. Dev felt deceived because he had invited Sai Baba to his Udyapan ceremony and did not recognize Him when He arrived in the disguise of a Sanyasi. Dev wrote to Jog, complaining that Baba's promise "all turned out otherwise." However, Baba explained that He had indeed attended with two others, just as He had said he would. As revealed in Chapter 40, Dev's delusion stemmed from his own expectations and his failure to connect the Sanyasi's visit with Baba's promise, leading him to feel ashamed of his own lack of perception once he learned the truth.