The skeleton of the creature is not typical of your average Canine. So here is another theory to consider, we may be dealing with a creature that lived 240 million years ago. The Chupacabra could possibly be a relative of the primitive Thrinaxodon or if we wanted to venture even closer to the edge it could very well be one. There is a possibility that the Thrinaxodon could have survived the extinction level event that allegedly killed the dinosaurs. Ground Zero recently wrote an article that talked about the possibility of prehistoric creatures living in South America.
Evidence shows that the temperature dropped at the end of the Mesozoic era and the sea levels fell.
This destroyed the perfect green house that kept all kinds of life fruitful. A sudden change in climate affected the growth of plants throwing the ecosystem out of balance and depleting the food supply for the animals. However areas of South America and Africa have virtually remained unchanged since that time. The latest reports from Nicaragua claim that the remains of what is believed to be a Chupacabra have been found and many scientists are saying that the specimen may be the remains of a canine. Zootechnician Giocconda Chevez, who reached the site to learn more about the discovery, noted that the animal had extremely high nails located above its claws which possibly aided it in attacking its victims, along with the oversized set of fangs.