I agree, hawk not only problem.
Below is something I posted back in 2019. I also do not like the plantings butted up to woods or property I do not control. I am also making extensive use of fencing and dogs. I can free-range chickens over about 8 acres where predators are excluded.
On this site, cover patches is a term of my making. Cover patches are usually densely vegetated area that birds the size of a chicken can use as a refuge from predators and the elements. The location provides a good view of surroundings while enabling chickens to be relatively hidden from prying eyes, Ideally, the vegetation is arranged such that aerial predators can not fly or at least sustain flapping flight when penetrating the patch in pursuit of a chicken. The patch forces a raptor to operate on ground at same level as the chickens. Some chickens can turn around and fight back in such patches. I use the patches extensively and always trying to make so they are more visually appealing.
I like patches to be at least 6 feet wide and 4 feet tall. Some plant communities that have tried that appear to work.
Brambles
Sumac
Buckbrush
Blueberries (high bush)
False Indigo
Cedar tree
Osage Orange
Rose of Sharon
Dense stand of cool season grasses
Dense stands of warm season grasses