I think having the ducks, turkey, geese, and a dog do help keep the larger hawks at bay, but that pesky small hawk still comes at least once a day.
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I do have a rooster, but he's a bit of a pansy LOL. I keep the little wimp around because he's adorable, but he doesn't watch over the hens at all. My son goes out every few hours with a blow horn to scare away any nearby predators. Might look into getting an actual rooster, like a RIRHawk pictured appears to be an immature accipiter of some sort. Not a Peregrine Falcon.

I had supplied an appropriate link to enable guessing to be taken out of the mix a couple of times, but as it doesn't seem to be used, and as we don't have a limitless supply of Hawk types I'll present them for you.
We have 1 Genus Pandionidae, 3 Falconidae, 5 Accipitridae, and a Partridge in a pair tree. Does it really matter?