The time honored argument has been solved again by science.
It is claimed in certain circles that dogs are better than cats, and some believe it, much like some believe the scientific logic of Rush Limbaugh.
Unless of course one has a cat, then one tends to accumulate legitimate proofs such as Carl Sagan and Niels Bohr might produce, and which are compelling presented in this production, once you get past the hideous "cleaning the dog's tongue after-it-has-eaten-the-contents-of-the-baby's-diaper commercial". The product is a God-send for dog owners, please buy one immediately!
In science few questions of this importance are ever completely resolved, new knowledge may come to light, but it only adds to a growing body of evidence.