Not really, I'm being sarcastic. These links are totally related.
Because people are still stupid enough to to claim that mangy coyotes (or possibly coydogs) are...well, you know.
Pics show chupacabra in Texas, some believe
Here is a link about the original Puerto Rico sighting: Seeking the Puerto Rican chupacabra
You should note two things from this article: 1. The sketch of the original alleged creature based on the woman's description of the thing; and 2. That she supposedly saw it in the second week of August, 1995.
Next, please view this image of a model made of the monster from the movie Species.
And finally, the imdb page for the movie Species. If you scroll down to the movie details, you will see that it was released on July 7, 1995.
How the chupacabra morphed from an alien vampire into a mangy dog, I'll never know.