Can you tell me the story about the tiger that died in front of Sai Baba?

Certainly. Chapter 31 recounts the story of a fierce, diseased, and restless tiger brought by some darveshis to see Sai Baba. After getting Baba's consent, they carefully brought the chained animal before him. Upon seeing Sai's radiant form and meeting his gaze, the tiger was startled and bowed its head with great reverence. As Sai gazed upon it with a loving heart, the tiger struck its tail on the ground three times, placed its body at Sai's feet, and with one final roar, it died. The onlookers were struck with wonder, witnessing the creature attain liberation peacefully in the presence of the saint, as detailed in Chapter 31.