This phrase is used to mark the beginning of a new part of the story. If your language has a way for doing this, you could consider using that method here.
This refers to the fatty parts of the lambs that he had killed, it was the best part of the animal. AT: "some of their fat parts" (See: [[rc://en/ta/man/translate/figs-explicit]])
This means that the expression on his face showed that he was angry or jealous. Some languages have an idiom that describes what a person's face looks like when he is angry. (See: [[rc://en/ta/man/translate/figs-idiom]])