Rat thoughts

We have two large plastic buckets outside for the animals to drink from.  One of them has an electric deicer, the other does not.  Whenever I go outside, I check on the buckets and break up any ice that has formed in the cold bucket.

For some reason, all the animals prefer to drink out of the ice bucket than the heated bucket.  I guess the concept of warm water on a cold day must be alien to them.