Owls get guineas who roost in the trees all the time, they will get hens as well. If they are darker colored it is better than if they are lighter colored and show up better at night but they can still be eaten. Put a run around your coop and lock them in the fenced area during the day so they can't go in the tree. i'd keep them penned until they learn to like thier coop. If you really want them to freerange, I guess you could put up a fenced run around the coop and give a treat every day inside the run, late in the afternoon well before they go to roost and then lock them in the run so they go to roost in the coop at night. Then let them freerange in mornings and early afternoon only.
If your run is too sunny try putting some shadecloth over the top of part of it so they have some shade. Your run should be covered on top with at least netting or chickenwire. Make sure they are cooped at night if you don't have a really predator proof run.
If your run is too sunny try putting some shadecloth over the top of part of it so they have some shade. Your run should be covered on top with at least netting or chickenwire. Make sure they are cooped at night if you don't have a really predator proof run.
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