How long does a chicken's molting last?
Molting is the process of shedding and renewing its feathers. During the molt the reproductive system of the bird is allowed a complete rest from laying and the bird builds up its body reserves of nutrients.
It is a natural process, designed to maintain the birds' ability to escape enemies by flight( strong new feathers) and to provide greater protection against cold winter conditions.
In most breeds the molt occurs once per year but can actually happen twice in the same year. The molt can last from 3 months and occasionally for up to 5 months depending on the condition of the bird at the start of molt. A good tonic added to the drinking water will help speed this along.