What Are Chupacabra?

I wonder where they stay during the daytime. We haven't caught one and put a collar on it. That'd be pretty interesting, wouldn't it? So let's talk about some theories about what they are. Besides my own theory. The first theory is that they are a type of alien. Although this seems a little bit less likely to me because of the nature of the chupacabra. They come in, they send your goats, and they're not like aggressive towards people. Like if they see a person, they like hiss and run. And it seems more of an animalistic kind of behavior, something you think is of this earth. If it's not of