My girls are terrified of any water that isn't in their waterer! I too do cold/frozen fruit/veggies. I also bury frozen water bottles in zip lock bags in their hen house bedding since they insist on being in there mid day. If I leave the bottles in view, it's too scarey. Sometimes, if it's just too hot, I pin them under my arm and soak them with the hose. If you've heard the phrase "mad as a wet hen". . . chickens!!