What's wrong with the tail of the thrush?

The tail of the thrush is fooled, indicating that it is in the feather change period.This bird's feather change period is from July to September. When changing hair, it will fade first, and then grow new hair.The hair fading must keep the environment hygiene. At this time, the feed does not need to be changed, and the previous one can be used.When you have a new hair, you need to add some oily feed to promote its development.In addition, don't take a bath during the hair change.