What should I do if I don't eat grass and stalks

The reason why grass and birds do not eat may be their own reason, or it may be an external problem.There are two reasons for themselves, one is frightened, just raised for a while, and the other is to get sick. This requires the cause of the cause and then prescribed the right medicine.There are two types of external problems. One is temperature discomfort. Too high temperature or too low will affect its appetite. The other is that the feed is not closed and needs to be replaced in time.