I'm giving my chicks (about 8-9 weeks) watermelon for electrolytes. Watermelon is naturally very high in electolytes and they absolutely love it. If I go out there without a piece of watermelon they act real dissapointed! lol
I use the Bragg's Apple Cider vinegar too, and I fill up their watering container with ice during the hottest part of the day. They really seem to be fine despite the heat, it got up to 104 degrees here yesterday! I'm probably more worried about them than I need to be. One thing I did notice is that they are eating less during the day, but then they desperately want to pig out when the sun goes down.