Board Thread:Episode discussions/@comment-34367047-20180812204237/@comment-1894786-20180818200108

Well, the Annunaki can only take a physical form in the world if they possess an animal. The Evil Entity was itself an Annunaki, so it actually makes sense that the animals did betray their human masters due to being more vulnerable to its effects.

But I guess it could also make sense for the animals to be immune due to it being trapped.