Why did the darveshis feel both sad and pleased when their tiger died in front of Sai?

The darveshis experienced conflicting emotions for very specific reasons, as detailed in Chapter 31. They were sad-faced because the tiger was their primary means of livelihood and provided for their family's sustenance, so its death represented a significant material loss. However, they were also pleased because they understood the spiritual significance of the event. They recognized that the diseased creature had attained liberation by dying in the presence of a great saint, which they knew was a fortunate and meritorious end, freeing it from its suffering and sins.