Why were the darveshis both happy and sad after their tiger died in front of Sai?

The darveshis had conflicting emotions for very different reasons, as explained in Chapter 31. They were sad-faced because the tiger was their "means of livelihood" and their "family's sustenance," and its death meant a loss of income. However, they also looked pleased because they understood that the diseased creature had "attained liberation." They recognized that to leave the body before a saint's eyes is a result of great merit, and for this reason, the darveshis were ultimately "pleased at heart" for the tiger's salvation.