My dogs love ice cubes. Untiiiiil I introduced them to "Ice Pups". They now turn their noses up at ice cubes and my older dog has actually spat an ice cube across the room and looked at me like, "what was THAT?"
Ice Pups are made in the ice cube tray. The product is a cannister of powder that you mix up: 2 tblsp with one cup of warm water (enought for 1 tray). It is all natural- chicken, barley, alfalfa, etc. It can also be made into a hot broth for them.
You could do this on the cheap with chicken stock, I suspect. That is what I will do next time- "Ice Pups" the product is $15 a cannister. But it makes 30 trays of ice cubes.