What scares away foxes?

Answer 1

If your chickens are truly free range then about the only way to keep the fox away is to get a dog or trap the fox and relocate it far away.

You can also build a fenced area and not allow the chickens to roam the farmyard.

Answer 2

I would shoot it or put something that smells in its den.

Answer 3

Put a fence or wiring around the hutch. Also you could put a strong smell like vineager or some oily fish far away from the hutch.

Answer 4

Unless you keep the cat indoors at all times, you cannot keep them away from birds. Cats have a natural instinct to hunt. You can't really combat this.