in the first place. [Why Do Cats Bury Their Poop?]

So, how dramatically would the rodent population increase if cats suddenly vanished? It just so happens that several scientific studies have been conducted that paint a vivid picture. A 1997 study in Great Britain found that the average house cat brought home more than 11 dead animals (including mice, birds, frogs and more) in the course of six months. That meant the 9 million cats of Britain were collectively killing close to 200 million wild specimens per year — not including all those they did not offer up to their owners. A study in New Zealand in 1979 found that, when cats were nearly eradicated from a small island, the local rat population quickly quadrupled.

And if the rodent population shot up, this would of course trigger a cascade of other ecological effects. On that same island in New Zealand, for instance, ecologists observed that, as rat numbers increased in the absence of cats, the population of seabirds whose eggs rats preyed upon declined. If the approximately 220 million domestic cats in the world all bit the dust, seabird populations would likely fall worldwide, while the populations of non-cat predators that prey on rats would be expected to increase.

"All species have an impact," Beck said.

And let's not forget the emotional toll that a mass cat death would take on us humans: "In this country, cats are much loved by many. While there are more dog-owning households (38 percent) than cat- owning households (34 percent), there are actually more domestic cats than dogs because cat owners own more of them. Cats as pets have always been appreciated for the contact, relatively low maintenance, and pedomorphic (child-like) face and general morphology."