I think your fence plan sounds good. We have 4 foot goat fencing and a strand of barb above that. I like the deer to stay out too, and the extra height added with the barbed wire seems to help with that as well. And we have chicken wire around the pasture the chickens are in. Are the other critters attacking your chickens in the daytime or at night? Do you lock your chickens in the coop at night? We have to here or we end up with problems. And I’m sure not to leave any dog or cat food out after dark either, it attracts all kinds of woodland creatures. All deer feeders and such are also far from our pastures. Rabbits can be an issue too, at least they are for us. They dig under the fences to live in the pastures which only makes it easier for other animals to get under the fences. So I have to run a pretty tight ship lol the rabbits must go too.. not to mention they can draw in foxes and other predators as well, possibly coyotes. And foxes can fit through some pretty small holes. We check the fence on a regular basis for any issues and we hunt everything we have to. We pay special attention to the seasons when young are being kicked out on their own, young coyotes/foxes are more likely to look for easy meals. The fencing works well for us as long as we don’t slack on it. It needs regular maintenance just like a dog does. The fences definitely don’t bark tho
Also, coyotes typically really don’t like human activity. We see them, we hear them, we know they even visit our yard sometimes, but they haven’t pushed it with us before. Just them being around doesn’t necessarily mean they’re a threat, only if they’re showing aggression and pushing their limits. If you think you’re dealing with an aggressive bunch, a guardian may be the best choice too, along with the fence. You’ll have to check me on this, but I believe there’s research shown that hunting coyotes often makes them worse. They’re pretty organized and will only breed more if they feel their numbers are dwindling. Yikes.. It may also make them more aggressive as the order of their pack is altered when they lose members.
On another note, I’ve heard of people using donkeys for livestock guardians too. Anyone know about that?