What do our pets do all day?

I discovered that I was not alone in wondering what our pets get up to when we are not at home, (see Cooper the camera cat )
Jeanne commented: 'Can there be a cat owner alive who hasn't at some point wondered "where the hell do you go all day, Tiddles?" ' and now someone else has e-mailed me this video clip.
I am not sure where it comes from but apparently, whenever the owners of this house, which you can see has a swimming pool, came home, they found puddles of water all around.
They believed that the neighbours’ kids waited till they went out to take a dip so they installed a camera and this is what they saw:

Mystery solved ...