for birds when it's hot? I have the Perky-Pet Water Cooler Bird Waterer but the water gets hot after a few hours. I already have a weather dome that blocks the sun but it still gets hot... Is putting ice in the water even safe? Once the ice melts with the water it changes the taste of the water and tastes disgusting to me so I wouldn't even do that with the bird water cooler. I don't have any trees in my backyard...