Now that the puppies are four weeks old we introduce water to them. You know, it's a funny thing—they like it, play in it, slap at it with their feet, push their brothers and sisters into it, and step in it. If it's hot they will even sleep in it! There are many things you can do with water if you are a puppy. All of which are fun and exciting. How can such a clear substance be so fun... so wonderful? One cannot truly know the answer to this unless one is a four week old puppy playing with a stainless steel bowl of water for the first time!