What do pearl birds look at age

Usually the older pearl birds, the more red in the mouth and feet, and the color on the cheeks will deepen.If it is a younger bird, its feathers are more bright, and the skin is very tender, and there is no thick keratin.When buying this kind of bird, you must buy a good mental state, the younger the younger, the better, the less easy to raise, and the longer time to live.