In the Old and Middle Stone Age (in the Netherlands about 250,000–7,300 years ago) the people were hunters & gatherers. They hunted for wild animals, but did not keep them themselves. The dog appeared though, from the Middle Stone Age (about 10,000–7,300 years ago). This is the oldest domestic animal. In the New Stone Age, farmers settled in the Netherlands. They introduced cattle, sheep, goat and pigs. So, from this time on, people kept domestic animals. Since the transition from the New Stone Age to Bronze Age, about 2,200–2,000 BC, horses are kept.