Key West is a city, small size, but very congested and every corner occupied by buildings and vehicles. No foxes. The only predators are humans and it's illegal to kill them! Even so. well many meet that fate anyway. There are actually a few invasive species taken hold down there, including iguanas but nothing as annoying as chickens. If you like a nice garden...forget it. They dig up and pick through everything. My mom actually took in a cock-fighting rooster that showed up. He was a big and beautiful bird, and, surprisingly domesticated.