When you listen to Eb or Dresden talk about Black Court vampires they refer to them as "things" or "it", and not as a person. Well when the BCV's had Dresden, one of the twins said "lets feed it to my sister", when talking about Harry. Mavra refused saying that Harry's kind isn't for them but for Drakul.
It's odd that he referred to Harry as "It". Is this how they think of all humans, or is it because Harry is a Starborn? Reminds me of when Harry first met Kincaid and Kincaid told Harry he was as much human as Harry was.