I have seen a chicken hunting mice. It's absolutely astounding. Before seeing it in action I had no idea chickens would go after such large prey, or that they would be such efficient hunters. They must have amazing eyesight, or some other ability to detect prey, because they appear to be able to detect hiding rodents from a long way away.

This was a local wild chicken that had presumably escaped from a coop, and it appeared to sustain itself on mice all summer.