What's wrong with the crow's mouth open?

The crows often open their mouths because they need to heat the heat.In the summer, you need to do a good job of shading, and at the same time, you must keep ventilation. This can prevent high temperature and strong light from affecting birds and avoid heat stroke.Because bacteria are easy to breed in summer, it is necessary to clean up the bird cage and keep the environment hygiene.It is best to put a cage in the cage at night. The advantage of this is to prevent mosquito bite and reduce the risk of illness.