 Jim Crisula, CBS News. How do you beat the summer heat at the zoo? Well, they've come up with some innovative ideas at the Palm Beach Zoo. Otters get blocks of ice and frozen fish in their water. Tigers get frozen cow bones in blocks of ice with sides of frozen goat milk. And giant tortoises are getting cold water showers. Zookeepers say those giant tortoises can feel the cold water all the way through their shells. Linda Kenyon, CBS News.