Molting is the natural shedding of old feathers and growth of new ones. It can occur at any time due to lack of water, food, or sudden change in normal lighting conditions. Broody hen molt furiously after their eggs have hatched as they return to normal routines. Feathers consist on 85% protein and feather productions places great demand on a chicken's energy and nutrient stores, because of this egg production is likely to drop. Molting takes 2-12 weeks or more. Newly emerging feathers have a vein-filled shaft/quill which can bleed if cut or injured.