What animal does mildred turn ethel to?

In Ray Bradbury's "Fahrenheit 451," Mildred refers to Ethel as a "dumb animal," specifically likening her to a "cow." This comparison reflects Mildred's disdain and detachment from genuine human connection, as she views Ethel and others around her as mindless and conforming to societal expectations. The metaphor underscores the theme of dehumanization prevalent in the novel.