Chupacabra

The frenzy had died down slightly by 2000, but picked back up in 2004 when something began attacking livestock in Texas.

A farmer shot one of the offenders, and later more alleged Chupacabra carcasses turned up

Source: http://latino.foxnews.com/latino/news/2011/07/20/chupacabra-caper-confounds-texas-town/