I would call a rescue or your states department on wildlife. If nothing else they will be able to humanely euthanize the hawk. You can throw a towel over it and put it in a box in the mean time. If they can rehab it...hopefully it will have learned its lesson...just because they are called...
I make homemade Greek yogurt and while I usually use the left over whey to make bread, I sometimes put some in a small bowl and feed to my chickens. They get crazy when they see me coming with the bowl! Whey is a good source of protein and nutrients plus probiotics.
This is my first time raising chickens, but not my husband's and if he had his way...we still wouldn't have chickens! We have 5 ISA hens and an ISA/Ameraucana X rooster named Wilbur. He showed up in our coop one day...don't know who put him there😉.
Recently retired and moved to Tennessee and...
I use my yogurt whey in place of water when I make bread. I don't have any "bad smell" when baking and everyone is always asking what makes my bread so delicious. I freeze my whey until I'm ready to bake, but if I have too much I take a small bowl out to my chickens...they love it.