How do you look at the age?

The age of the Bird Bird can be judged by its paws. The paw looks tender, the skin is thin, and the toenails are short, indicating that it is a young bird.If the paw looks old, the skin on it is thicker, and the toenails are long, which means that it is an old bird.Moreover, the feathers of the old bird are also messy, not as soft as the young bird's feathers, and the color is not as bright as the latter.