Question

what are the moulting, what is it's purpose​

Answer 1

Answer:

used about an animal or a bird) to lose hair or feathers before growing new ones.

hope it helps

Answer 2

Answer:

To chickens, it's a sign that it is time to renew their feathers. Losing feathers and re-growing them is called molting and occurs every year when the days get shorter. During molt, chickens typically stop laying eggs and use this time to build up their nutrient reserves.