What's wrong with sparrow feathers fluffy

Sparrow feathers are fluffy.Usually, it will become fluffy when its feathers in the winter, and there will be a large amount of air in it to form an insulation layer, so that it will not freeze to death.However, if it is raised artificially, it is best to put it in the room warm, and don't let it be blown by cold water.In addition, it is necessary to provide enough food. Generally, it is mixed with seeds. It is best to use warm water if you drink water, and you cannot use cold water.