There was a time when hunters shot buffalo for sport, and the hairy beasts may have gone extinct but for some rational thinking on the topic.
Buffalo are found on a few ranches around the country, and according to a news report, one rancher in King County, Texas, had a herd of about 120 until recently. It seems that 51 of them wandered across his property line onto a neighbor's land. So the neighbor shot them dead.
Here's a link to a news report at Everythinglubbock.com. And here's an interesting sentence from that article:
"The 51 killed is worth more than $280,000."
Good fences make good neighbors. Otherwise don't let your buffalo roam.
Updated 1/26/10: Apparently QB Ranch, the home of those buffalo, is a hunting ranch at which hunters would be expected to pay from $2,000 to $3,500 for the privilege of killing a buffalo. So it's not exactly as if the owner was a conservationist trying to preserve the animals. Additionally, the ranch website price list throws into question the $280,000 value that appeared in the Everythinglubbock.com article: $280,000 ÷ 51 = $5,490.20.