You said Kashiram fed ants, but my understanding is that Sai Baba told him to feed a black dog to cure his pride. Can you confirm which animal it was and how that specific act helped him become humble?

The information you have seems to confuse two different aspects of Kashiram's journey as described in chapter 0. The text confirms that Kashiram was advised to feed sugar to ants, but this advice came from a saint named Janakidas Baba, not Sai Baba. This practice was unrelated to his lesson in humility. Kashiram's pride was connected to his giving of Dakshina. To cure this, Sai Baba orchestrated a period of financial hardship for Kashiram and then repeatedly demanded money. This forced Kashiram to realize he had no inherent power to give, which effectively removed his pride. Therefore, feeding ants and overcoming pride were separate events involving different circumstances.