How did God feed the children of Israel when they were in the wilderness?

One of the great puzzles of the story of the Exodus is that the Israelites complained bitterly to Moses that they had no food (Exodus 16:3), yet they had rich herds of cattle.

Answer

Because, the cattle and sheep is reserved for offerings for the LORD. Exodus 20:24, 29:11-17

Answer:

God gave them manna in order to teach certain lessons (Deuteronomy ch.8). In order to at least partially unravel the riddle of their complaints, see this link:

http://Judaism.answers.com/kosher/the-complaints-in-the-wilderness-and-the-golden-calf