Massive wall of text and I missed the important bit. They were fed very well.
"The surprises were just beginning. Faunal analyst Richard Redding, of the University of Michigan Museum of Natural History, identified tremendous quantities of cattle, sheep, and goat bone, "enough to feed several thousand people, even if they ate meat every day," Lehner adds. Redding, who has worked at archaeological sites all over the Middle East, "was astounded by the amount of cattle bone he was finding," says Lehner. He could identify much of it as "young, under two years of age, and it tended to be male." Here was evidence of many people—presumably not slaves or common laborers, but skilled workers—feasting on prime beef, the best meat available."
"The surprises were just beginning. Faunal analyst Richard Redding, of the University of Michigan Museum of Natural History, identified tremendous quantities of cattle, sheep, and goat bone, "enough to feed several thousand people, even if they ate meat every day," Lehner adds. Redding, who has worked at archaeological sites all over the Middle East, "was astounded by the amount of cattle bone he was finding," says Lehner. He could identify much of it as "young, under two years of age, and it tended to be male." Here was evidence of many people—presumably not slaves or common laborers, but skilled workers—feasting on prime beef, the best meat available."