What Guyven said, but the second season has a bit of a sea change, but it's still just as good. There are more humans introduced, but there still isn't any intelligible dialogue (well, nothing in modern English, anyway), but the problems Spear and Fang face are just as daunting. Still ongoing. I'm not going to say shit-all about it otherwise until you've seen it, because anything else I might say would be a spoiler.

But yeah, get into it, it's one of the few things actually worth following atm.

And still no sex, but lots of gory violence.