The laughably titled CHUPACABRA VS THE ALAMO was one of those movies made for The Sci-Fi Channel, or SYFY as it's come to be. It was almost entirely on the casting of Erik Estrada (who of course rides a motorcycle) that I even gave this one a shot, though I was pleasantly surprised by the outcome. Both spectacularly goofy and spectacularly decent, the film tells of a huge swarm of tiny-but-powerful, blood-thirsty, rabid wild dogs* invading San Antonio, where a DEA agent, his wayward son, and a gang of drug dealers must take up arms and are ultimately sieged inside the historic monument to American independence. At times very silly, but at other times quite solid, counter to my natural expectations. Ultimately, a rather enjoyable little B picture. Estrada in particular comes off great, and the script is largely quite good -though the mass-attack scenes and the whole climax are downright farcical. In the end, though, it comes off like a 70's B picture that doesn't take itself too seriously, so you might find it worth a look.
(*Back in the 90's, the mythical Chupacabra was described as a short, clawed, quasi-humanoid bat-like creature with bulging eyes. It has since been changed to accompany reports of mange-ridden coyotes and wild dogs. The creatures in this film, rendered in typically awful CGI, look like mutant chihuahuas.)