If you are a cat owner, you may have received the gift of a rodent or bird at some point. When this happens, your cat is happy and they feel that they have done something good. There are plenty of wives-tales about how cats like to smother babies, but it seems as though New Zealand wishes to humanely wipe cats completely off the island.

The concern in New Zealand is that cats are killing machines and they aren't referring to feral cats. These are domesticated cats can kill between 1.4 billion and 3.7 billion birds and between 6.9 and 20.7 billion small mammals each year.

Live Science is reporting that 15% of the total bird population in the United States is depleted due to cats.

Live Science goes on to say this in their study:

For this broader analysis, the team first looked at all prior studies on bird deaths and estimated that around 84 million owned-cats live in the country, many of which are allowed outdoors.

“A lot of these cats may go outside and go to 10 different houses, but they go back to their house and cuddle up on Mr. Smith’s lap at night,” Marra said.

Based on an analysis of past studies, the researchers estimated that each of those felines killed between four and 18 birds a year, and between eight and 21 small mammals per year.

While it is feral cats that do the most "damage" as they are the most blood-thirst of the felines, one man in New Zealand, Gareth Morgan, has recently been advocating a complete ban on cats.

There is even a Twitter campaign to eliminate our feline friends from New Zealand with the hashtag: #catstogo

Mr. Morgan has even taken to artworld to push his campaign:

Something tells me that the Grumpy Cat would not approve.