Not only do my dog and cats know when we are leaving, they also know the sound of our car pulling up the driveway and usually are waiting to greet us. We have spoiled our animals so much that when our golden retreiver goes out for his potty break in the morning, all the animals get a treat! Even one of our outside feral cats knows when it is treat time and waits outside the kitchen sliding glass for her treat too! Yes, we are slaves to our pets.
On the subject of dogs and cats, let's see who really rules - how many of you are dog lovers and how many are cat lovers? Or (Psychocruiser) you can add any other pet of your choice. Personally, I love them both but I've always been a cat lover. Cats rule!