And in the wild, and even at home, cats have a natural tendency to attempt to clean up after they pee or poop by burying their deposits under soil when available, while dogs don't.
BTW, if you wanted to compare the two fairly, you could have used a much cuter dog (maybe a poodle) than a pit bull. No comparison in aesthetics between the two animals you show. By using a pit bull, you play into the stereotype of Republicans as "mean spirited."
Speak to the folks at *The Looking Spoon*...all a spoof. :)