This movie didn’t get wide release. It starts with some teenage boys finding a girl in the woods at some sacrificial alter. It’s clear to the audience she’s some sort of zombie, but the guys don’t know what to do. They end up keeping her in a bathroom for the summer, and there’s like a coming of age subplot and the zombie girl is oddly ignored for a lot of the movie. At some point they’re like, “She won’t eat!” but then they discover she’ll eat living things so they feed her rats and…. it was a weird movie, but it was so strange I liked it. I think I found it between 2008 and 2010.