With domesticated animals such as dogs, goats, sheep, and cattle, and crops, human society changed. Now, having crops and livestock, they no longer needed to move around. They could build better settlements. Their diet also changed. It included more oats and vegetables. People also started to keep and manage food: it was not advisable to eat all grain seeds, because then there would be no seeds left to plant the next year. Also, there were surplus in some years and that could be traded for other goods with other peoples.