Northwest_Wannabe
Songster
I would maybe try either a taller fence or netting off the top, or maybe both? 

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If you get very creative (and have a tall ladder) you can probably work netting around and between the trees, securing them to branches and such. Your coop is tall enough to be an anchor point on that side. Might need some taller supports on the side where the low black fence is - sort of like how I managed to get a 6' head clearance on the edge of a 4' fence with U posts and tension wire:
View attachment 2268139
Of course keep in mind that falling branches/debris can catch in the netting, so it's something you'll need to manage.
This looks great! What type of netting did you use?