Twiggy attended the Good Omens Official Fanfiction Summer School, putting her species down as 'hellhound/dog hybrid'. This led to her finding out exactly how difficult school can be when you lack opposable thumbs or human vocal chords. It also led to embarrassing diplomatic incidents, shall we say, with the mini-Hellhounds.
She also attended the Official Fanfiction University of Redwall, in the form of an osprey — once again suffering from a lack of dexterity. A bird's manipulative digits are also its feet, and it's hard to balance on one foot and even harder to hover over a desk.