That my friend is one of two things either its a one of those new species of animals mentioned in the book of revelations in the Bible or Its the Infamous and elusive Chupacabra. Heres a picture could this possibly be a skeletol remain of the creatures you saw? Nobody and noone could identify this creatures skeleton. According to all data and research this creature in the picture does not exist. The picture didnt want to upload so heres the link to the picture.
http://www.elchupacabra.com/2_chupacarcus.jpg