What is going on with the grass tail hair?

The straw tail hair is lost because it is necessary to change the feathers. During the period, pay attention to supplementing nutrition to ensure the growth of the new feathers.During the period of change of feathers, the most important thing is to clean up, because after hair removal, the bird's resistance decreases, and the cage must be kept clean, so that it is not easy to get sick. At the same timeIt is still easy to catch a cold.