Question

name the animals or insects
which can digest keratin

Answer 1

Common keratin consuming insect pests (clockwise from top left): Varied carpet beetle, Webbing clothes moth, Black carpet beetle and Casemaking clothes moth
There are various types of keratins within a single animal. Keratin is nutritionally useless to humans, since it is not hydrolyzed by digestive enzymes, but it can be used as fertilizer, being slowly broken down by bacteria

Answer 2

It is the key structural material making up hair, horns, claws, hooves, and the outer layer of human skin. Keratin is also the protein that protects epithelial cells from damage or stress. Keratin is extremely insoluble in water and organic solvents.