I like that grape vine idea, too. I planted some grapes this year, but I didn't plant them for the chickens. I may have to plant some more next year WHEN or IF I get my new breeder barn done!
I had one hen yesterday that I was really worried about. I was cleaning out the coop and making some modifications in there. She was not happy with me at all. She wanted to lay an egg in the corner on the floor where I had scooped out all the clippings. She kept trying to round up clippings to make a nest there. My son was helping me, and she was bumping into our legs as we worked on re-attaching the roost (I put hinges on the top so the whole thing would swing up and hook to the ceiling while I clean under it.... works great!) Since we were working on the roost it was a while before I got shavings laid back down in there. She fussed and fussed around till she was panting and making a terrible noise with her lungs. I know she was overheating. It was SO HOT in there! We were'nt having any fun, either, working in there with no breeze. She finally gave up and went out in the shade.
So today everyone seems to be doing okay even with the heat. Hubby, son and I have been picking up bales of hay. No fun with 118 degree heat index.