Those hens will adapt! We are keeping a dozen hens over the winter (roosters are in the freezer) and I watched them adapt to hawk attacks. After watching a few white rocks turn into avian appetizers I noticed that any time a large winged shape cast it’s shadow on the yard the chickens run and hide under the spruce and balsams or if too far from the cover of the trees they leaned into the buildings as close as they could. It’s rather humorous watching chickens head for cover!
I’m not getting any more white chickens next year, because they are so easy to spot they become the most neurotic animal on the place!
Good luck with the Yotes.