Great information everyone!
It's the black bears that we have here.
I hadn't thought about keeping food cleaned up until Sunday night. Our neighbor called us because he spotted a strange acting raccoon in his yard, heading into ours. Seemed sick... drooping head and moving slow. I found it next to my chicken coop. It was attracted by the pile of buggy apples I've been throwing to the chickens. The coop was closed, thank the Lord, but what if we'd got home from church late. No more excess food kept out for the chickens from now on.
Electronetting isn't an option for us. I'll shore up the wire on the windows and try to find some way to make the doors sturdier.
We do have a border collie who patrols the yard at dawn and again at dusk. He deters the foxes who may be out and about while my chickens are free-ranging. Hopefully his scent and barking will be enough to make a bear go around us.