The term 'shedding feathers' is a metaphor for molting, which is the process of birds and other animals shedding their old feathers or fur in order to grow new ones. Molting is a natural process that occurs in many species, and it is necessary for the animal's health and growth. The process of molting usually takes place over a period of several weeks or months, and the new feathers or fur are usually brighter and healthier than the old ones.