Mongrel

My cousin told me this story. It was about 15 years ago, when she was still a student. One late evening, she was walking home with some classmates (and, at the time, roommates). The weather was nice, so they walked. Along the way, a dog started following them—a small, red-haired mongrel. It followed them for almost half the city. When the girls went into the store, the dog obediently sat by the entrance and waited for them. When they got home, the dog froze at the entrance. My sister's friends invited it into the apartment to feed it, since it had followed them for so long. But it wouldn't come in until my sister invited it in (the apartment, by the way, belonged to my sister).

 In good light, my friends noticed something unusual about the dog: its eyes were burgundy, as if bloodshot from a beating. Its pupils were barely visible, and there was no white at all (it sounds crazy, but more than one person saw it). When the girls sat down in the kitchen and started setting the table—my sister's fiancé and his brother were supposed to be visiting—my sister suddenly felt ill: dizzy and nauseous. She went into her room and lay down on the bed. The dog ran after her and hid in the corner under the bed. My sister passed out as soon as she lay down.

Then, according to my friends, some guys came in and asked where the owner was. My friends said she felt ill. The guys went into the room where my sister was sleeping and with difficulty pulled the dog out from under the bed, as it was snapping furiously. As soon as they pulled her out, they immediately threw her into the entryway, and she seemed to vanish into the dim light of the entryway: the guys said they didn't even realize where she ran off to. Then the guys and friends sat down at the table. About twenty minutes later, my sister got up and came into the kitchen. Everyone asked how she was feeling, to which my sister replied that she was fine...

So what happened? I'm skeptical, but there's no reason not to believe my sister, and there are five people involved, which rules out the possibility of fiction or one person imagining it all.