What is going on with a bird's dilute?

Shouzhu birds are diluing that the birds are sick, which may be caused by climate change, or it may be unsatic environment or something that is not clean.If it is caused by a climate, pay attention to keep warm and avoid changes in temperature.If it is caused by unhygienic environment, you need to clean the bird cage in time, and do not stack the stool.If it is caused by eating bad things, you need to change the food and drinking water in the tank every day.