A friend of mine has hawk problems ( have hawks but haven't lost any chickens yet to them). He put a pole in the center of his fenced-in yard and then strung string/wire from the center to various points all around the fence. Kinda of like an umbrella without fabric. The birds can't get in...
German shepherds are good size dogs. The coyotes shouldn't mess with them but ya never know. If the coyotes come in force with others and they out number the dogs, there may be an issue. Most people say dogs are good to keep coyotes and other varmints away. Good luck!
My neighbor, to protect his flock from air predators, has a pole in the center of his fenced in yard. Then from that, he strings wire to the fence, kind of like a umbrella without the fabric. The wire spaced so they can't fly in, their wings would hit the wires. It works great for him. I haven't...
I live in the boondocks and have lots of predators (coons, skunks, possums). I saw a coyote last week in the pasture and last night at 6 pm saw him standing right outside my fenced-in chicken yard trying to figure out how to get in. YIKES! I have a 5' fence and it is electric but I am afraid to...