Moult, Molt v. i. (past & past part. molted or moulted; pres. part. molting or moulting) To shed or cast the hair, feathers, skin, horns, or the like, as an animal or a bird.
... tell you why; so shall my anticipation preuent your discouery of your secricie to the King and Queene: moult no feather, I haue of late, but wherefore I know not, lost all my mirth, forgone all custome of exercise; and indeed, it goes so heauenly with my disposition; that this goodly frame the Earth, seemes ... — The First Folio [35 Plays] • William Shakespeare