Y'know, I woulda taken the chupacabras stories and tossed em' out the window except for two important points.
1.) I have a well respected news photog pal who almost hit one with his car in Puerto Rico. It scared him so damned bad he did an on spot investigation and what he got from the investigation fits in with this conclusion: Don't let drunk/doped up military engage in an operation. Especially near civilian areas.
2.) The people who reported these attacks, where dozens of chickens and goats and livestock were killed are for the most part poor rural folk. If you've been to Mexico or Puerto Rico or S. America you know how poor these people are. Some are lucky enough to actually have goats and chickens and pigs. These animals are so prized many are treated like pets instead of livestock. They can't afford to lose ONE of them yet several get killed in minutes with no tracks or any scent sends dogs scurrying.
In these areas the death of a goat means simply SOMEBODY is gonna starve til they get a new one. Not only that but there's no government subsidies for killed livestock. So there's no way in hell a guy's gonna fake this shit for publicity because he ain't gettin' paid.
No something else is afoot and my bet is it's some kinda animal or animals that got flushed outta the jungles in S. America due to deforestation and has been making it's way to and fro and being transported by trophy hunters who didn't know how stupid it was to capture these things and release them in rural or populated areas whether as a prank or by being too drunk and flying a helicopter full of them and dropping crates by accident.