Hazel never really knew how to be a horse being a reject hated by the herd her mother was in. Being a half demon doesn't help her cause in trying to fit in. Living on her own since as a yearling she learned from different animals on how to live. She adapted well to these creatures. Which is why other horses get weirded out see her behave less equine like. In actuality this is her disguise her actual occupation is being the harbinger of death as like her sire.