What is that smell ?!...

It is everywhere. Not strong like a dirty cat box, but subtle like a dirty gym suit. I walk around the house on a quest. The dog follows me. What is that smell? At times it is as prominent as paint drying, other times it is faint like the smell of a new plastic toy. I ask my son when was the last time he showered and I ask my daughter if she is using some new hair product. Jeeze, they are easily insulted.... It must be the cats. We have two cats and one of them has breath that could knock a buzzard off of a garbage truck. I hunt high and low, the dog is not helpful. He keeps running back and forth making the cats hide. I go into the kitchen to make a cup of tea. (a much nicer smelling room) Suddenly, there is that smell. Could there be an animal under the house? The dog walks away, bored with the game, and the smell goes with him. "Hey, when was the last time the dog had a bath?" I shout down the hall. Now the dog is insulted. He runs down into the basement confirming he is the smell... peace and love to you all