Okay, I have a sincere question for the don't kill or shoot or hunt anything peeps. . .
What are you going to do about the over population of some populations of animals that are currently causing ecological nightmares in some parts of the country?
For example, in my DH's hunting club's lease, which is about 2000 acres that includes some 2nd growth swamp (swamp that was cut once about a hundred years ago and is now protected land), they've decided that if they see a hog at any time, they will shoot it dead. The wild hogs have been destroying the environment and are a real menace. (As it's a nuisance animal, you can shoot a pig dead at any time, btw, at least in Louisiana.)
The deer population has exploded recently and the cause seems to be the lack of hunters; if this rise in population continues unabated, the result will be that those very cute rats-with-hooves will start destroying their environment and, my suspicion is that eventually we'd see some sort of disease run through their numbers, something even worse than the evil stuff that's affecting the deer populations in the middle Atlantic right now.
The natural predators of deer and pigs are in small numbers (let's face it, no one wants to have a cougar living near them, and any cougar in a 20 mile radius is really too close if you have small children, pets and/or livestock).