Some of the creatures that come to mind out on "the Spit" will be dogs cats, raccoons, weasels, hawks, owls, perhaps foxes and a few others. Did I mention dogs?
These are all in the small predator class.
Your best bet is to learn the Rule of Fences, the Law of Electric Wire and the Dogma of Trap and Snare.
For the winged predators, you'll have to submit to Agents of Federal Law, since it is a violation of that law to molest birds of prey. So ask ahead of time with your animal control and fish and game people about them.
Some people will recommend you "shoot, shovel and shut up" when it comes to BOP's, but you didn't hear that from me.
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I'd also recommend you change your thinking from "being scared" to "The Best Defense is a Good Offense."
It seems a subtlety, I admit, but how you program your mind makes a difference in what you do.
You can only combat that which you face, after all.
Know your enemy and have a plan. Your chickens will thank you for it.