I mean, it's for the environment: the link and choice excerpts below:

Maybe Pro Publica could investigate...

Polluting pets: the devastating impact of man's best friend - Yahoo! News

Polluting pets: the devastating impact of man's best friendby Isabelle Toussaint and Jurgen Hecker – Sun Dec 20, 3:23 pm ET
PARIS (AFP) – Man's best friend could be one of the environment's worst enemies, according to a new study which says the carbon pawprint of a pet dog is more than double that of a gas-guzzling sports utility vehicle.


Combine the land required to generate its food and a "medium" sized dog has an annual footprint of 0.84 hectares (2.07 acres) -- around twice the 0.41 hectares required by a 4x4 driving 10,000 kilometres (6,200 miles) a year, including energy to build the car.

To confirm the results, the New Scientist magazine asked John Barrett at the Stockholm Environment Institute in York, Britain, to calculate eco-pawprints based on his own data. The results were essentially the same.


And pets' environmental impact is not limited to their carbon footprint, as cats and dogs devastate wildlife, spread disease and pollute waterways, the Vales say.

With a total 7.7 million cats in Britain, more than 188 million wild animals are hunted, killed and eaten by feline predators per year, or an average 25 birds, mammals and frogs per cat, according to figures in the New Scientist.

Likewise, dogs decrease biodiversity in areas they are walked, while their faeces cause high bacterial levels in rivers and streams, making the water unsafe to drink, starving waterways of oxygen and killing aquatic life.

And cat poo can be even more toxic than doggy doo -- owners who flush their litter down the toilet ultimately infect sea otters and other animals with toxoplasma gondii, which causes a killer brain disease.

But the best way of compensating for that paw or clawprint is to make sure your animal is dual purpose, the Vales urge. Get a hen, which offsets its impact by laying edible eggs, or a rabbit, prepared to make the ultimate environmental sacrifice by ending up on the dinner table.

"Rabbits are good, provided you eat them," said Robert Vale.
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__________________
John
Some circumstantial evidence is very strong, as when you find a trout in the milk.--Henry David Thoreau