Judgement Tales from Panchatantra

During the summer holidays, Kutu, Ki, and Minku visit Nani's farmhouse. They enjoy a picnic by the lake and play in the treehouse. Minku is tasked with guarding their basket of goodies. When Kutu and Ki return, they mistakenly believe the ducks have eaten their treats. Minku, however, has safely stored the basket in the treehouse. After realizing their mistake, Kutu and Ki apologize to Minku, and the friends happily share the goodies.

Why were Kutu and Ki initially angry with Minku?

What did Kutu and Ki realize about Minku after finding the basket?